654. A 21st Century View of Allowed and Forbidden Electrocyclic Reactions
Qingyang Zhou, Garrett Kukier, Igor Gordiy, Roald Hoffmann], Jeffrey I. Seeman, and K. N. Houk,
Articles
653. Superconductivity in SrB3C3 clathrate
Li Zhu, Hanyu Liu, Maddury Somayazulu, Yue Meng, Piotr A. Guńka, Thomas B. Shiell, Curtis Kenney-Benson, Stella Chariton, Vitali B. Prakapenka, Hyeok Yoon, Jarryd A. Horn, Johnpierre Paglione, Roald Hoffmann, R. E. Cohen, Timothy A. Strobel, Phys. Rev. Res. 2023, 5,013012.
PhysRevResearch.5.013012.pdf
(2.18 MB)
652. Variations on the Bergman Cyclization Theme: Electrocyclizations of Ionic Penta-, Hepta-, and Octadiynes
Dominic A. Sirianni,, Xinli Song, Salmika Wairegi, Evan B. Wang, Sebastian A. Mendoza-Gomez, Adam Luxon, Maxwell Zimmerley, Ariana Nussdorf, Michael Filatov-Gulak, Roald Hoffmann, and Carol A. Parish, J. Amer. Chem. Soc. 2023, 145, 39, 21408–21418
651. Experimental observation of open structures in elemental magnesium at terapascal pressures
M. G. Gorman, S. Elatresh, A. Lazicki, M. M. E. Cormier, S. A. Bonev, D. McGonegle, R. Briggs, A. L. Coleman, S. D. Rothman, L. Peacock, J. V. Bernier, F. Coppari, D. G. Braun, J. R. Rygg, D. E. Fratanduono, R. Hoffmann, G. W. Collins, J. S. Wark, R. F. Smith, J. H. Eggert & M. I. McMahon ,Nature Physics 18, 1307–1311 (2022).
experimental observation.pdf
(5.71 MB)
650. Varying electronic configurations in compressed atoms: from the role of the spatial extension of atomic orbitals to the change of electronic configuration as an isobaric transformation
R. Cammi, M. Rahm, N.W. Ashcroft, R. Hoffmann, J. Chem. Theory Comput. 2020, 16, 8, 5047–5056.
650.pdf
(1.83 MB)
649. Expanding the Frontiers of Higher-Order Cycloadditions
D. McLeod, M. K. Thøgersen, N. Inunnguaq Jessen, K. A. Jørgensen, C. Jamieson, X.-S. Xue, K. N. Houk, F. Liu, and R. Hoffmann, Accts. Sci. Res. 52, 3488-3501 (2019).
649 Expanding the Frontiers.pdf
(5.65 MB)
648. Do Diradicals Behave Like Radicals?
T. Stuyver, B. Chen, T. Zeng, P. Geerlings, F. De Proft, and R. Hoffmann. Chem. Revs, 119, 11291-11351 (2019).
648 Do diradicals.pdf
(10.91 MB)
647. Squeezing All Elements in the Periodic Table: Electron Configuration and Electronegativity of the Atoms under Compression
M. Rahm, R. Cammi, N. W. Ashcroft, R. Hoffmann, J. Amer. Chem. Soc. 141, 10253-10271 (2019).
647 squeezing all elements.pdf
(2.22 MB)
646. High-pressure lithium as an elemental topological semimetal
S. F. Elatresh, Z. Zhou, N. W. Ashcroft, S. A. Bonev, Ji Feng, and R. Hoffmann, Phys. Rev. Materials, 3, 044203 (2019).
646 High pressure lithium.pdf
(479.02 KB)
645. Cross Conjugation in Polyenes and Related Hydrocarbons: What Can Be Learned from Valence Bond Theory about Single-Molecule Conductance?
J. Gu, W. Wu, T. Stuyver, D. Danovich, R. Hoffmann, Y. Tsuji, S. Shaik, J. Amer. Chem. Soc. 141, 6030-6047 (2019).
645 Cross Conjugation in Polyenes.pdf
(679.16 KB)
644. Electronegativity Seen as the Ground-State Average Valence Electron Binding Energy
M. Rahm, T. Zeng, R. Hoffmann, J. Amer. Chem. Soc., 141, 342-351 (2019).
643. Carbon Permeation: the Prerequisite Elementary Step in Iron-Catalyzed Fischer-Tropsch Synthesis
R. Gao, X. Liu, Z. Cao, X.-W. Liu, K. Lu, D. Ma, Y. Yang, Y.-W. Li, R. Hoffmann, X.-D. Wen, Catalysis Letters, 149, 645-664 (2019).
642. Alkyl Isosteres
C.P. Priyakumari, R. Hoffmann, J. Amer. Chem. Soc., 140, 12844-12852 (2018).
642 Alkyl isosteres jacs.8b06141.pdf
(454.48 KB)
641. Mirrors of Bonding in Perovskites
M. Goesten, R. Hoffmann, J. Amer. Chem. Soc., 140, 12996-13010 (2018).
641 mirrors of bonding jacs.8b08038.pdf
(719.04 KB)
640. Coarctate and Möbius – The Helical Orbitals of Allene and Other Cumulenes
M. H. Garner, R. Hoffmann, S. Rettrup, and G. C. Solomon, ACS Central Science (2018)
639s coarctate and moebius.pdf
(703.33 KB)
639. Quantum Interference, Graphs, Walks, and Polynomials
Y. Tsuji, E. Estrada, R. Movassagh, and R. Hoffmann, Chem. Revs. (2018)
638. Surface Activation of Transition Metal Nanoparticles for Heterogeneous Catalysis: What We Can Learn from Molecular Dynamics
X. Liu , X. Wen, and R. Hoffmann, ACS Catalysis, 8, 3365-3375 (2018).
637s Surface Activation._.pdf
(556.71 KB)
637. Carbon Nitride Nanothread Crystals Derived from Pyridine
X. Li, T. Wang, P. Duan, M. Baldini, H.-T. Huang, B. Chen, S. J. Juhl, D. Koeplinger, V. H. Crespi, K. Schmidt-Rohr, R. Hoffmann, N. Alem, M. Guthrie, X. Zhang, and J. V. Badding, J. Am. Chem. Soc. 140, 4969-4972 (2018).
636s carbon nitride nanothreads.pdf
(1.54 MB)
636. High Hydrides of Scandium under Pressure: Potential Superconductors
X. Ye, N. Zarifi, E. Zurek, R. Hoffmann, and N. W. Ashcroft, J. Phys. Chem. C, 122, 6298-6309 (2018).
635s High hydrides of Scandium.pdf
(800.17 KB)
635. Potential Semiconducting and Superconducting Metastable Si3C Structures under Pressure
G. Gao, X. Liang, N. W. Ashcroft, and R. Hoffmann, Chemistry of Materials, 30, 421–427 (2018).
634. All the Ways to Have Substituted Nanothreads
B. Chen, T. Wang, V. H. Crespi, X. Li, J. Badding, and R. Hoffmann, J. Chem. Theor. Comput. 14, 1131–1140 (2018).
633s All the Ways to have.pdf
(581.13 KB)
633. Alkali Metal Trihalides: M+X3- Ion Pair or MX—X2 Complex
Z. Sun, K. B. Moore, J. G. Hill, K. A. Peterson, H. F. Schaefer, and R. Hoffmann, J. Phys. Chem. B 122, 3339 (2017).
632. Mechanochemical Synthesis of Carbon Nanothread Single Crystals
X. Li, M. Baldini, T. Wang, B. Chen, E. Xu, B. Vermilyea, V. Crespi, R. Hoffmann, J. Molaison, C. Tulk, M. Guthrie, S. Sinogeikin, J. Badding. J. Amer. Chem. Soc. 139, 16343–16349 (2017).
631. Donor-Acceptor Strategies for Stabilizing Planar Diplumbenes
P. C. Parambil and R. Hoffmann, Organometallics, 36, 4825–4833 (2017).
631s Donor-Acceptor Strategies.pdf
(2.85 MB)
630. Stabilizing a Different Cyclooctatetraene Stereoisomer
L. Li, M. Lei, Y. Xie, H. F. Schaefer III, B. Chen, and R. Hoffmann, Proc. Natl. Acad. Sci. 114, 9803-9808 (2017).
629. The Effect of Pressure on Organic Reactions in Fluids— a New Theoretical Perspective
B. Chen, R. Hoffmann, and R. Cammi, Angew. Chem. Int. Ed. 56, 11126-11142 (2017).
628. Valence Bond Theory Reveals the Hidden Delocalized-Diradical Character of Polyenes
J. Gua, W. Wu, D. Danovich, R. Hoffmann, Y. Tsuji, and S. Shaik, J. Amer. Chem. Soc., 139, 9302-9316 (2017).
628s valence bond theory reveals.pdf
(1.92 MB)
627. Ternary Gold Hydrides: Routes to Stable and Potentially Superconducting Compounds
M. Rahm, R. Hoffmann, and N. W. Ashcroft, J. Amer. Chem. Soc., 139, 8740-8751 (2017).
627s ternary gold hydrides.pdf
(582.11 KB)
626. Dioxygen – What Makes this Triplet Diradical Kinetically Persistent?
W. Thatcher Borden, R. Hoffmann, T. Stuyver, and B. Chen, J. Amer. Chem. Soc., 139, 9010-9018 (2017)
625. An Iodabenzene Story
A. M. Rawashdeh, C.P. Priyakumari, T. Zeng, and R. Hoffmann, J. Amer. Chem. Soc., 139, 7124-7129 (2017).
625s An iodabenzene story.pdf
(2.17 MB)
624. Potential High-Tc Superconducting Ianthanum and Yttrium Hydrides at High Pressure
H. Liu, I. I. Naumov, R. Hoffmann, N. W. Ashcroft, and R. J. Hemley. Proc. Natl. Acad. Sci. USA, 114, 6990-6995 (2017).
624s.pdf
(1.46 MB)
623. Evidence from Fermi Surface Analysis for the Low-Temperature Structure of Lithium
S. F. Elatresh, W. Cai, N. W. Ashcroft, R. Hoffmann, S. Deemyad, and S. A. Bonev, Proc. Natl. Acad. Sci. USA, 114, 5389-5394 (2017).
623s.pdf
(1000.74 KB)
622. The Green’s Function for the Hückel (Tight) Binding Model
R. Movassagh, G. Strang, Y. Tsuji, and R. Hoffmann. J. Math. Phys., 58, 033505 (2017).
622s The Green's function for the Hueckel.._.pdf
(547.76 KB)
621. 8-Coordinate Fluoride in a Silicate Double Ring
M.G. Goesten, R. Hoffmann, F.M. Bickelhaupt, and E.J.M. Hensen. Proc. Nat. Acad. Sci. 114, 828-833 (2017).
621.pdf
(928.25 KB)
620. Enhancing the Conductivity of Molecular Electronic Devices
T. Stuyver, S. Fias, Frank De Proft, P. Geerlings, Y. Tsuji, and R. Hoffmann. J. Chem. Phys. 146, 092310 (2017).
619.pdf
(1.95 MB)
619. Quasimolecules in Compressed Lithium
M. Miao, R. Hoffmann, I. Naumov, and R. Hemley. Angew. Chem., Int. Ed. 56, 972-975 (2016).
620.pdf
(2.02 MB)
618. Structural Diversity and Electron Confinement in Li4N: Potential for 0-D, 2-D, and 3-D Electrides
Y. Tsuji, P.L.V.K. Dasari, S.F. Elatresh, R. Hoffmann, N.W. Ashcroft. J. Am. Chem. Soc. 138, 14108-14120 (2016).
618.pdf
(7.91 MB)
617. Semiconductive K2MSbS3(SH)H (M=Zn,Cd) Featuring One-Dimensional [M2Sb2S6(SH)2]4- Chains
X. Zhang, N. Yi, R. Hoffmann, C. Zheng, J. Lin and F. Huang. Inorg. Chem. 55, 9742-9747 (2016).
617.pdf
(1.98 MB)
616. Atomic and Ionic Radii of Elements 1-96
M. Rahm, R. Hoffmann, N. W. Ashcroft, Chem. Eur. J. 22, 14625-14632 (2016).
616.pdf
(1.54 MB)
615. From Widely Accepted Concepts to Inverting LIgand Fields
R. Hoffmann, S. Alvarez, C. Mealli, A. Falceto, T.J. Cahill, III, T. Zeng, and G. Menca. Chem. Rev., 116, 8173-8192 (2016).
615.pdf
(3.59 MB)
614. Helical Oligoenes: Conformations, Bond Alternation, and Competing Through-Bond and Through-Space Transmission
Y. Tsuji and R. Hoffmann. Chem., Eur. J., 22, 4878-4888 (2016).
613. The Dimerization of H2NO
P. Xu and R. Hoffmann. J. Phys. Chem. A, 120, 1283-1296 (2016).
613.pdf
(3 MB)
612. Distinguishing Bonds
M. Rahm and R. Hoffmann. J. Amer. Chem. Soc. 138, 3731-3744 (2016).
612.pdf
(2.69 MB)
611. The Close Relation Between Quantum Interference in Molecular Conductance and Diradical Existence.
Y. Tsuji, R. Hoffmann, M. Strange, and G. C. Solomon, Proc. Natl. Acad. Sci. USA 113, E 413-419 (2016).
E413.full_.pdf
(921.13 KB)
610. AuO: Evolving from Dis- to Comproportionation, and Back Again
A. Hermann, M. Derzsi, W. Grochala, R. Hoffmann, Inorg. Chem. 55, 1278-1286 (2016).
611.pdf
(5.22 MB)
609. Revisiting Ir(CO)3Cl
Y. Tsuji, R. Hoffmann, J. S. Miller. Polyhedron 103, 141-149 (2016).
607.pdf
(2.44 MB)
608. Linearly Polymerized Benzene Arrays as Intermediates, Tracing Pathways to Carbon Nanothreads
B. Chen, R. Hoffmann, N. W. Ashcroft, J. Badding, E. Xu, V. Crespi. J. Amer. Chem. Soc. 137, 14373-14386 (2015).
610.pdf
(6.78 MB)
607. Li-filled B-Substituted Carbon Clathrates
T. Zeng, R. Hoffmann, R. Nesper, N. W. Ashcroft, T. A. Strobel, and D. M. Proserpio, J. Amer. Chem. Soc. 137, 12639-12652 (2015).
607_0.pdf
(7.7 MB)
606. Exponential Attenuation of Through-Bond Transmission in a Polyene: Theory and Potential Realizations
Y. Tsuji, R. Movassagh, S. Datta, R. Hoffmann, ACS Nano 9, 11109-11120 (2015).
606.pdf
(1.65 MB)
605. Tuning the Ground State Symmetry of Acetylenyl Radicals
T. Zeng, D. Danovich, S. Shaik, N. Ananth, and R. Hoffmann. ACS Central Science 1, 270-278 (2015).
605.pdf
(1.26 MB)
604. Towards an Experimental Quantum Chemistry: Exploring a New Energy Partitioning.
M. Rahm and R. Hoffmann. J. Am. Chem. Soc. 137, 10282-10291 (2015).
604.pdf
(827.26 KB)
603. Chemical Bonding in Hydrogen and Lithium under Pressure
I. Naumov, R. J. Hemley, R. Hoffmann and N. W. Ashcroft. J. Chem. Phys. 143, 064702 (2015).
603.pdf
(19.37 MB)
602. Anomalous Orbital Admixture in Ammine Complexes
T. Zeng, K. M. Lancaster, N. Ananth, and R, Hoffmann. J. Organometal. Chem. 792, 6-12 (2015).
602.pdf
(992.47 KB)
601. On Lattice Stability and the High Pressure Melting Mechanism of Dense Hydrogen up to 1.5 TPa
H.Y. Geng, R. Hoffmann, and Q. Yu. Phys. Rev. B 92, 104103 (2015).
601.pdf
(444.46 KB)
600. Molecular CsF5 and CsF2+
A.Y. Rogachev, M.-S. Miao, G. Merino, and R. Hoffmann. Angew. Chem. Int. Ed. 54, 8275-8278 (2015).
599. High Pressure Electrides: The Chemical Nature of Interstitial Quasi-atoms
M.-S. Miao and Roald Hoffmann. J. Am. Chem. Soc. 137, 3631-3637 (2015).
599.pdf
(7.97 MB)
598. Theoretical Study of Phase Separation of Scandium Hydrides under High Pressure.
X. Ye, R. Hoffmann, and N. W. Ashcroft. J. Phys. Chem. C 119, 5614-5625 (2015).
598.pdf
(5.19 MB)
597. Novel Si Networks in the CaSi Phase Diagram under Pressure
G. Gao, N. W. Ashcroft, M.-S. Miao, and R. Hoffmann. J. Phys. Chem. C 118, 25167-25175 (2014); DOI: 10.1021/jp507813y
597.pdf
(4.16 MB)
596. Quantum Interference in Polyenes
Y. Tsuji, R. Hoffmann, R. Movassagh, and S. Datta. J. Chem. Phys. 141, 224311 (2014); DOI: 10.1063/1.4903043.
596.pdf
(2.12 MB)
595. Tuning Spin-States of Carbynes and Silylynes: A Long Jump with One Leg.
T. Zeng, H. Wang, Y. Lu, Y. Xie, H. Wang, H.F. Schaeffer III, N. Ananth, and R. Hoffmann. J. Am. Chem. Soc. 136, 13388-13398 (2014).
595.pdf
(1.64 MB)
594. Seeking Small Molecules for Singlet Fission: A Heteroatom Substitution Strategy
T. Zeng, N. Ananth, and R. Hoffmann. J. Am. Chem. Soc. 136, 12638-12647 (2014).
594.pdf
(1.71 MB)
593. Lithium Hydroxide, LiOH, at Elevated Densities
A. Herrmann, N. W. Ashcroft, and R. Hoffmann. J. Chem. Phys. 141, 024505 (2014).
593.pdf
(2.41 MB)
592. High Pressure Electrides: A Predictive Chemical and Physical Theory
M.-S. Miao and R. Hoffmann. Accts. Chem. Res. 47, 1311-1317 (2014).
592.pdf
(1.45 MB)
591. Solid Argon as a Possible Substrate for Quasi-freestanding Silicene
S. Sattar, R. Hoffmann, and U. Schwingenschlogl. New J. Phys. 16, 065001 (2014).
591.pdf
(572.4 KB)
590. Hydrostatic High-Pressure Studies to 25 GPa on the Model Superconducting Pnictide La Ru2P2
N. Foroozani, J. Lim, J. Schilling, R. Fotovat, C. Zheng, and R. Hoffmann. J. of Physics: Conference Series 500, 032007 (2014).
590.pdf
(3.76 MB)
589. The Low-Lying Electronic States of Pentacene and Their Roles in Singlet Fission
T. Zeng, R. Hoffmann, and N. Ananth. J. Am. Chem. Soc. 136, 5755-5764 (2014).
589.pdf
(2.56 MB)
588. Frontier Orbital Control of Molecular Conductance and Its Switching
Y. Tsuji and R. Hoffmann. Angew. Chem., Int. Ed. 53, 1-6 (2014).
587. Silicon Monoxide at 1 atm and Elevated Pressures: Crystalline or Amorphous?
K. AlKaabi, D. L. V. K. Prasad, P. Kroll, N. W. Ashcroft, and R. Hoffmann. J. Am. Chem. Soc. 136, 3410-3423 (2014).
587.pdf
(1.82 MB)
586. One Molecule, Two Atoms, Three Views, Four Bonds?
S. Shaik, H. S. Rzepa, and R. Hoffmann. Angew. Chem., Int. Ed. 52, 3020-3033 (2013).
586.pdf
(869.28 KB)
586. Evolving Structural Diversity and Metallicity in Compressed Lithium Azide
D.L.V.K. N.W. Ashcroft, and R. Hoffmann. J. Phys. Chem. C 117, 20838-20846 (2013).
586b.pdf
(3.18 MB)
586. Theoretical Study of the Ground-state Structures and Properties of Niobium Hydrides under Pressure.
G. Gao, R. Hoffmann, N. W. Ashcroft, H. Liu, A. Bergara, and Y. Ma. Phys. Rev. B 88, 184104 (2013).
586_1.pdf
(2.93 MB)
585. Isotopic Differentiation and Sublattice Melting in Dense Dynamic Ice.
A. Hermann, N. W. Ashcroft, and R. Hoffmann. Phys. Rev. B 88, 214113 (2013).
585.pdf
(1.25 MB)
584. How to Make the σ0π2 Singlet the Ground State of Carbenes
B. Chen, A. Y. Rogachev, D. A. Hrovat, R. Hoffmann, and W. T. Borden. J. Am. Chem. Soc. 135, 13954-13964 (2013).
584.pdf
(1.35 MB)
583. The Unusual and the Expected in the Si/C Phase Diagram
G. Gao, N. W. Ashcroft, and R. Hoffmann. J. Am. Chem. Soc. 135, 11651-11656 (2013).
583.pdf
(1.4 MB)
582. Squaroglitter: A 3,4-connected Carbon Net
D. L. V. K. Prasad, M. J. Bucknum, and R. Hoffmann. J. Chem. Theor. Comput. 9, 3855-3859 (2013).
582.pdf
(1.68 MB)
581. Condensed Astatine: Monoatomic and Metallic
A. Hermann, R. Hoffmann, and N.W. Ashcroft. Physical Review Letters 111, 116404 (2013).
581.pdf
(775.08 KB)
580. The Close Relationship between the Crystal Structures of MO and MSO4 Compounds (M = Group 10, 11 or 12 Metal), and Predicted Structures for AuO and PtSO4
M. Derzsi, A. Hermann, R. Hoffmann, and W. Grochala. European Journal of Inorganic Chemistry 5094-5102 (2013).
580.pdf
(824.15 KB)
579. Hypervalent Compounds as Ligands: I3-anion with Transition Metal Pentacarbonyls
A. Rogachev and R. Hoffmann. Inorganic Chemistry 52, 7161-7171 (2013).
579.pdf
(1.06 MB)
578. Binary compounds of boron and beryllium: A rich structural arena with space for predictions
Chem.-Eur. J. 19, 4184–4197 (2013).
577. Iodine (I2) as a Janus-Faced Ligand in Organometallics
A. Y. Rogachev and R. Hoffmann. J. Am. Chem. Soc. 135, 3262 (2013).
577.pdf
(1.17 MB)
576. Small but Strong Lessons from Chemistry for Nanoscience
R. Hoffmann. Angew. Chem. 52, 93 (2013).
575. Two-Dimensional CdSe Nanosheets and Their Interaction with Stabilizing Ligands
X.-D. Wen, R. Hoffmann, and N.W. Ashcroft. Adv. Mater. 25, 261-266 (2013).
572.pdf
(870.92 KB)
574. From Wade-Mingos to Zintl-Klemm at 100Gpa: Binary Compounds of Boron and Lithium
A. Hermann, A. McSorley, N. W. Ashcroft, and R. Hoffmann. J. Am. Chem. Soc. 134, 18606 (2012).
576.pdf
(2.71 MB)
573. LiB and its Boron-Deficient Variants under Pressure
A. Hermann, A. Suárez, I. G. Gurtubay, L.-M. Yang, A. Bergara, N. W. Ashcroft, and R. Hoffmann. Phys. Rev. B 86, 144110 (2012).
574.pdf
(1.31 MB)
572. Lithium Amide (LiNH2) under Pressure
P. L. V. K. Dasari, N. W. Ashcroft, and R. Hoffmann. J. Phys. Chem. A 116, 10027-11036 (2012).
573.pdf
(3.6 MB)
571. LiBeB: A Predicted Phase with Structural and Electronic Peculiarities
A. Hermann, B. L. Ivanov, N. W. Ashcroft, and R. Hoffmann. Phys. Rev. B 86, 014104 (2012).
571.pdf
(3.44 MB)
570. Making Sense of Boron-Rich Binary Be--B Phases
A. Hermann, N. W. Ashcroft, and R. Hoffmann. Inorganic Chemistry 51, 9066-9075 (2012).
570.pdf
(1.98 MB)
569. Stabilizing H3-: Or Are We Stabilizing a Proton?
S.J. Grabowski and R. Hoffmann. Chem. Phys. Chem., 13, 2286-2288 (2012).
568. Ionic N-B-N and B-N-B Substituted Benzene Analogues: A Theoretical Analysis
K. AlKaabi, P.L.V.K. Dasari, and R. Hoffmann. J. Am. Chem. Soc.,134, 12252-12258 (2012).
Ionic N-B-N.pdf
(779.07 KB)
567. Graphane Nanotubes
X.-D. Wen, T. Yang, R. Hoffmann, N.W. Ashcroft, R. L. Martin, S. P. Rudin, and J. Zhu. ACS Nano., 6, 7142-7150 (2012).
Graphane nanotubes.pdf
(2.57 MB)
566. Molecular Orbitals of the Oxocarbons (CO)n, n = 2 – 6. Why Does (CO)4 Have a Triplet Ground State?
X. Bao, X. Zhou, C. F. Lovitt, A. Venkatraman, D. A. Hrovat, R. Gleiter, R. Hoffmann, and W. T. Borden. J. Am. Chem. Soc., 134, 10259-10270 (2012).
Molecular Orbitals.pdf
(1.8 MB)
565. Jailbreaking Benzene Dimers
A. Yu. Rogachev, X.-D. Wen, and R. Hoffmann, J. Am. Chem. Soc., 134, 8062-8065 (2012).
Jailbreaking.pdf
(1.05 MB)
564. High Pressure Ices
A. Hermann, N. W. Ashcroft, and R. Hoffmann, Proc. Natl. Acad. Sci.109, 745-750 (2012).
High Pressure Ices.pdf
(1.1 MB)
563. WHn under Pressure
P. Zaleski-Ejgierd, V. Labet, T. A. Strobel, R. Hoffmann, and N.W. Ashcroft, J. Phys.: Condens. Matter 24, 155701 (2012).
WHn under pressure.pdf
(1.98 MB)
562. A Fresh Look at Dense Hydrogen under Pressure IV: Two Structural Models on the Road from Paired to Monatomic Hydrogen, Via a Possible Non-Crystalline Phase
V. Labet, R. Hoffmann, and N. W. Ashcroft. J. Chem. Phys. 136, 074504 (2012).
A Fresh Look IV.pdf
(1.3 MB)
561. A Fresh Look at Dense Hydrogen under Pressure III: Two Competing Effects and the Resulting Intramolecular H-H Separation in Solid Hydrogen under Pressure
V. Labet, R. Hoffmann, and N. W. Ashcroft. J. Chem. Phys. 136, 074503 (2012).
A Fresh Look III.pdf
(1.57 MB)
560. A Fresh Look at Dense Hydrogen under Pressure II: Chemical and Physical Models Aiding Our Understanding of Evolving H-H Distances
V. Labet, R. Hoffmann, and N. W. Ashcroft. J. Chem. Phys. 136, 074502 (2012).
A Fresh Look II.pdf
(1.19 MB)
559. A Fresh Look at Dense Hydrogen under Pressure I: An Introduction to the Problem, and an Index Probing Equalization of H-H Distances
V. Labet, P. Gonzalez-Morelos, R. Hoffmann, and N. W. Ashcroft. J. Chem. Phys. 136, 074501 (2012).
A Fresh Look I.pdf
(1.21 MB)
558. BH3 under Pressure: Leaving the Molecular Diborane Motif
Y. Yao and R. Hoffmann. J. Am. Chem. Soc. 133, 21002-21009 (2011).
BH3 under pressure.pdf
(2.3 MB)
557. Hunting Dimers
A. Rogachev, P. Jerabek, S. Klein, G. Frenking, and R. Hoffmann. Theoretical Chemical Accounts 131(3), 1-11 (2012).
Hunting Dimers.pdf
(1.02 MB)
556. Molecular models for WH6 under pressure
V. Labet, R. Hoffmann, and N. W. Ashcroft. New J. Chemistry 35, 2349-2355 (2011).
556.-molecular-models_0.pdf
(1.62 MB)
555. Benzene under High Pressure: A Story of Molecular Crystals Transforming to Saturated Networks, with a Possible Intermediate Metallic Phase
X.-D. Wen, R. Hoffmann, and N.W. Ashcroft. J. Am. Chem. Soc. 133, 9023-9035 (2011).
555.-benzene-under-high-pressure_0.pdf
(4.89 MB)
554. Freezing in Resonance Structures for Better Packing: XeF2 Becomes (XeF+) (F-) at Large Compression
D. Kurzydlowski, P. Zaleski-Ejgierd, W. Grochala, and R. Hoffmann. Inorg. Chem. 50, 3832-3840 (2011).
554.-freezing-in-resonance_0.pdf
(3.31 MB)
553. Graphane Sheets and Crystals under Pressure
X.-D. Wen, L. Hand, V. Labet, T. Yang, R. Hoffmann, N. W. Ashcroft, A. R. Oganov and A. O. Lyakhov. Proc. Natl. Acad. Sci. 108, 6833-6837 (2011).
553.-graphanes_0.pdf
(1.28 MB)
552. The Very Heavy and the Very Light: High Pressure Stabilization and Emergent Forms of PbH4
P. Zaleski-Ejgierd, R. Hoffmann, and N. W. Ashcroft. Phys. Rev. Lett. 107, D37002 (2011).
552 high pressure stab..pdf
(554.04 KB)
551. (Barely) Solid Li(NH3)4: The Electronics of an Expanded Metal
E. Zurek, X.-D. Wen, and R. Hoffmann. J. Am. Chem. Soc. 133, 3535-3547 (2011).
551.-barely-solid_0.pdf
(3.08 MB)
550. Connecting the Chemical and Physical Viewpoints of What Determines Structure: From 1-D Chains to γ-Brasses
R. F. Berger, P.L. Walters, S. Lee, and R. Hoffmann, Chem. Rev. 111, 4522-4545 (2011).
550.-connecting-the-chemical_0.pdf
(22.68 MB)
549. Segregation into Layers: A General Problem for Structural Instability under Pressure, Exemplified by SnH4
P. Gonzalez-Morelos, R. Hoffmann, and N. W. Ashcroft. Chem. Phys. Chem., 11, 3105-3112 (2010).
SEgregation into layers.pdf
(568.83 KB)
548. Reconstructing a Solid-Solid Phase Transformation Pathway in CdSe Nanosheets with Associate Soft Ligands
Z. Wang, X.-D. Wen, R. Hoffmann, J. S. Son, R. Li, C.-C. Fang, D.-M. Smilgies, and T. Hyeon, Proc. Natl. Acad. Sci., 107, 17119-17124 (2010).
548.-reconstructing-a-solid-solid_0.pdf
(2.35 MB)
547. Exploring Group 14 Structures: 1D to 2D to 3D
X.-D. Wen, T. J. Cahill, and R. Hoffmann, Chem. Eur. J. 16, 6555-6566 (2010).
546. Double-Diamond NaAl via Pressure: Understand Structure Through Jones-zone Activation
J. Feng, R. Hoffmann, and N. W. Ashcroft, J. Chem. Phys., 132, 114106 (2010).
546.-double-diamond_0.pdf
(835.33 KB)
545. Compressing the Most Hydrogen-Rich Inorganic Ion
G. Markopoulos, P. Kroll and R. Hoffmann, J. Am. Chem. Soc., 132, 748-755 (2010).
545.-compressing_0.pdf
(3.69 MB)
544. Playing the Quantum Chemical Slot Machine: An Exploration of ABX2 Compounds
X.-D. Wen, T. J. Cahill, N. M. Gerovac, M. J. Bucknum and R. Hoffmann, Inorg. Chem., 49, 249-260 (2010).
543. The Contributions of Through-Bond Interactions to the Singlet-Triplet Energy Difference in 1,3-Dehydrobenzene
H. Wei,, D. A. Hrovat, Y. R. Mo, R. Hoffmann, and W. Thatcher Borden, J. Amer. Chem. Soc. 113, 10351-10358 (2009).
543 The Contributions_0.pdf
(1.22 MB)
543. Tungsten-Doped Titanium Dioxide in the Rutile Structure: Theoretical Considerations
M. Aryampour, R. Hoffmann, and F. J. DiSalvo. Chem. Mater. 21, 1627-1635 (2009).
543a s.pdf
(963.66 KB)
542. Tuning of Metal-Metal Bonding by Counterion Size in Hypothetical AeTiO2 Compounds
X.-D. Wen, T. J. Cahill, R. Hoffman, and A. Miura, J. Am. Chem. Soc. 131, 14632-14633 (2009).
542._0.pdf
(356.43 KB)
541. A Molecular Perspective on Lithium-Ammonia Solutions
E. Zurek, P. P. Edwards, and R. Hoffmann, Angewandte Chem., 48, 8198-8232 (2009).
540. A Little Bit of Lithium Does a Lot for Hydrogen
E. Zurek, R. Hoffmann, N. W. Ashcroft, A. R. Oganov and A. O. Lyakhov, Proc. Natl. Acad. Sci. USA, 106, 17640-17643 (2009).
540._0.pdf
(837.84 KB)
539. A Bonding QuandaryA Demonstration of the Fact That Scientists Are Not Born With Logic
S. Alvarez, R. Hoffmann and C. Mealli, Chem. Eur. J., 15(34), 8358-8373 (2009).
538. Large-Scale Soft Colloidal Template Synthesis of 1.4 nm-Thick CdSe Nanosheets
J. S. Son, X.-D. Wen, J. Joo, J. Chae, S.-I. Baek, J. H. Kim, K. An, J. H. Yu, S. G. Kwon, S.-H. Choi, Z. Wang, Y.-W. Kim, Y. Kuk, R. Hoffmann, and T. Hyeon, Angew. Chem., Int. Ed., 48, 6861-6864 (2009).
537. Element Lines: Bonding in the Ternary Gold Polyphosphides, Au2MP2 with M = Pb, Tl, or Hg
X.-D. Wen, T. J. Cahill, and R. Hoffmann, J. Am. Chem. Soc., 131, 2199-2207 (2009).
537._0.pdf
(1.73 MB)
536. "Half Bonds" in an Unusual Coordinated S42- Rectangle
A. Poduska, R. Hoffmann, A. Ienco and C. Mealli, Chem. Asian J., 4, 302-313 (2009).
536._0.pdf
(747.87 KB)
535. Group 12 Dihalides: Structural Predilections from Gases to Solids
K. J. Donald, M. Hargittai and R. Hoffmann, Chem. Eur. J., 15, 158-177 (2009).
534. Parallel Disulfido Bridges in Bi- and Poly-Nuclear Transition Metal Compounds: Bonding Flexibility induced by Redox Chemistry
C. Mealli, A. Ienco, A. Messaoudi, A. Poduska, and R. Hoffmann. Inorganica Chimica Acta, 361, 3631-3637 (2008).
534.pdf
(496.62 KB)
533. Emergent reduction of electronic state dimensionality in dense ordered Be-Li alloys
J. Feng, R. Hennig, N.W. Ashcroft and R. Hoffmann, Nature 451, 445-448 (2008).
533s_0.pdf
(462.76 KB)
532. S42- Rings, Disulfides, and Sulfides in Transition Metal Complexes: The Subtle Interplay of Oxidation and Structure
C. Meali, A. Ienco, A. Poduska and R. Hoffmann, Angew. Chem. 47, 2864-2868 (2008).
531. Electronic effects in CO chemisorption on Pt-Pb intermetallic surfaces: A theoretical study
C. Ranjan, R. Hoffmann, F. J. DiSalvo, H. D. Abruña, J. Phys. Chem. C 111, 17357-17369 (2007).
531.pdf
(687.06 KB)
530. A Quantum Mechanically Guided View of Mg44Rh7
R. F. Berger, S. Lee and R. Hoffmann, Chem. Eur. J., 13, 7852-7863 (2007).
529. The Many Ways to Have a Quintuple Bond
G. Merino, K.J. Donald, J. D'Acchioli and R. Hoffmann, J. Am. Chem. Soc., 129, 15295-15302 (2007).
529s_0.pdf
(170.75 KB)
528. A Pnictogen of Peculiar Posture
A. Poduska and R. Hoffmann, Inorg. Chem. 46, 9146-9154 (2007).
528s_0.pdf
(356.46 KB)
527. Theoretical Indications of Singular Structural and Electronic Features of Laves-Phase CaLi2 Under Pressure
J. Feng, N. W. Ashcroft and R. Hoffmann, Phys. Rev. Letters, 98(24), 247002 (2007).
527.pdf
(697.33 KB)
526. Tuning the Bergman Cyclization by Introduction of Metal Fragments at Various Positions of the Enediyne. MetallaBergman Cyclizations.
E. Brzostowska Greer and R. Hoffmann, J. Am. Chem. Soc., 129, 4401-4409 (2007).
526s_0.pdf
(474.57 KB)
525. The Chemical Imagination at Work in Very Tight Places
W. Grochala, R. Hoffmann, J. Feng and N.W. Ashcroft, Angewandte Chemie, 46(20), 3620-3642 (2007).
524. Interpenetrating Covalent and Nonpolar Sublattices in Intermetallics: the NaCd2 Structure
D.C. Frederickson , S. Lee and R. Hoffmann, Angewandte Chemie, 46(12), 1958-1976 (2007).
523. Structure and Bonding in Boron Carbide: the Invincibility of Imperfections
M.M. Balakrishnaraajan, P.D. Pancharatna and R. Hoffmann, New Journal of Chemistry, 31(4), 473-485 (2007).
523.pdf
(1.8 MB)
522. Towards Superconductivity in Hydrides: Computational Studies of Two Hypothetical Ternary Compounds, YbIIBeH4 and Cs3YbIIIH6
T. Jaron, W. Grochala, and R. Hoffmann, J. Molec. Modeling 13, 769-774 (2007).
522.pdf
(317.51 KB)
521. Solid Memory: Structural Preferences in Group 2 Dihalide Monomers, Dimers and Solids
K. J. Donald and R. Hoffmann, J. Am. Chem. Soc. 128(34), 11236-11249 (2006).
521s_0.pdf
(481.04 KB)
520. Theoretical Studies on Doubly and Triply Linked Polymers of Ge9 Clusters
P.D. Pancharatna and R. Hoffmann, Inorganica Chimica Acta 359, 3776-3784 (2006).
520.pdf
(793.2 KB)
519. Snakes and Ladders: the Sigmatropic Shiftamer Concept
D. J. Tantillo and R. Hoffmann, Accounts of Chem. Research 39(7), 477-486 (2006).
519_0.pdf
(672.76 KB)
518. Prediction of thermodynamic stability and electronic structure of novel ternary lanthanide hydrides
T. Jaron, W. Grochala, and R. Hoffmann, J. Mater. Chem., 16, 1154-1160 (2006).
518.pdf
(506.2 KB)
517. Structures and Potential Superconductivity in SiH4 at High Pressure: En Route to "Metallic Hydrogen"
J. Feng, W. Grochala, T. Jar__n, R. Hoffmann, A. Bergera, and N.W. Ashcroft, Physical Review Letters, 96, 017006 1-3 (2006).
517s_0.pdf
(387.28 KB)
516. Oxygen Interstitials in Superconducting La2CuO4: Their Valence State and Role
K. H. Lee and R. Hoffmann, J. Phys. Chem. A 110, 609-617 (2006).
516.pdf
(331.11 KB)
515. Squeezing C-C Bonds
D. Huntley, G. Markopoulos, P. M. Donovan, L. T. Scott, and R. Hoffmann, Angew. Chem., 117, 7721-7725 (2005); Angew. Chem. Intl. Ed., 44(46), 7549-7553 (2005).
514. Planar and Pyramidal Tetracoordinate Carbon in Organoboron Compounds
R.M.Minyeav, T.N. Gribanova, V.I. Minkin, A.G. Starikov, R. Hoffmann, J. Org. Chem. 70, 6693-6704 (2005).
514s_0.pdf
(750.63 KB)
513. Transition Metal Complexes of Cyclic and Open Ozone and Thiozone
B. Flemmig, P.T. Wolczanski and R. Hoffmann, J. Am. Chem. Soc. 127, 1278-1285 (2005).
513s_0.pdf
(315.98 KB)
512. A Theoretical Study of Dicyclobuta[de ij]naphthalene and Dicycopenta[cd,gh]pentalene
M. Macaluso, C. A. Parish, R. Hoffmann and L. T. Scott, J. Org. Chem., 69, 8093-8100 (2004).
512.pdf
(603.02 KB)
511. Adsorption of CO on PtBi2 and PtBi surfaces
M. Oana, R. Hoffmann, H.D. Abruna, and F.J. DiSalvo, Surface Sci., 574, 1-16 (2005).
511.pdf
(678.44 KB)
510. Planar Tetracoordinate Carbon in Extended Systems
P.D. Pancharatna, M.A. Mendez-Rojas, A. Vela, and R. Hoffmann, J. Am. Chem. Soc., 126, 15309-15315 (2004).
509s_1.pdf
(510.77 KB)
509. How Do Electrons Travel in Unusual Metallic Fluorides of Ag+2?
T. Jaron, W. Grochala and Roald Hoffmann, Phys. Stat. Sol (b), 242(1), R1-R3 (2005).
509s_2.pdf
(510.77 KB)
508. Electron Deficient Bonding in Rhomboid Rings
M.M. Balakrishnarajan and R. Hoffmann, J. Am. Chem. Soc., 126, 13119-13131 (2004).
ja0467420_0.pdf
(949.84 KB)
507. The Nowotny Chimney Ladder Phases: Whence the 14 Electron Rule?
D.C. Frederickson, S. Lee and R. Hoffmann, Inorg. Chem., 43(20), 6159-6167 (2004).
507s_0.pdf
(662.89 KB)
506. The Nowotny Chimney Ladder Phases: Following the Cpseudo Clue to an Explanation of the 14 Electron Rule
D.C. Frederickson , S. Lee and R. Hoffmann, Inorg. Chem., 43(20), 6151-6158 (2004).
506s_0.pdf
(696.24 KB)
505. The Cyclopropylmethyl--3-Butenyl Rearrangement on Mo(110): a Radical Clock on a Surface?
B. Flemmig, I. Kretzschmar, C. Friend and R. Hoffmann, J. Phys. Chem. A, 108, 2972-2981 (2004).
505.pdf
(460.14 KB)
504. Main Group Element Nets to a T
A. Ienco, D. M. Proserpio and R. Hoffmann, Inorg. Chem., 43(8), 2526-2540 (2004).
504s_0.pdf
(787.41 KB)
503. Extended Barbaralanes: Sigmatropic Shiftamers or sigma-Polyacenes?
D.J. Tantillo, R. Hoffmann, K.N. Houk, P.M. Warner, E.C. Brown, and D.K. Henze, J. Am. Chem. Soc. 126, 4256-4263 (2004).
503s_0.pdf
(352.72 KB)
502. Thinking About Metal-Metal Quadruple Bonding in Extended Structures: a Hypothetical A2M6E8 Network,
M.M. Balakrishnarajan, P. Kroll, M.J. Bucknum and R. Hoffmann, NJC, 28, 185-190 (2004).
502s_0.pdf
(539.47 KB)
501. Hydrogen Migration Over Organic Tapes: [1,5] Sigmatropic Shiftamers
D.J. Tantillo and R. Hoffmann, Eur. J. Org. Chem., 2, 273-280 (2004).
500. Exohedral Multiple Bonding in Polyhedra II: Skeletal Distortions in Ring-Stacked Boranes
M.M. Balakrishnarajan and R. Hoffmann, Inorg. Chem., 43(1), 27-32 (2004).
500s_0.pdf
(263.54 KB)
499. Propensity of Different AgBr Surfaces for Photoinduced Silver Cluster Formation: A Molecular Orbital Analysis
P. Gutta and R. Hoffmann, J. Phys. Chem. A, 107, 8184-8190 (2003).
499.pdf
(503.15 KB)
498. Orbital Interactions between a C60 Molecule and Cu(111) Surface
A. Ogawa, M. Tachibana, K. Yoshizawa, H. Fujimoto and R. Hoffmann, J. Phys. Chem. B, 107(46), 12672-12679 (2003).
498.pdf
(472.2 KB)
497. Unusual Geometries and Questions of Oxidation State in Potential Sn(III) Chemistry
P. Gutta and R. Hoffmann, Inorg. Chem., 42(25), 8161-8170 (2003).
497.pdf
(436.09 KB)
496. Breaking Down Barriers: Sigmatropic Hydrogen Shifts, Electrocyclic Reactions, and 3-Center Cations
D.J. Tantillo and R. Hoffmann, Angew. Chem., 42(47), 5877-5882 (2003).
495. Helicoid Shiftamers for the Transport of π-Clumps and Charges, D.J. Tantillo & R. Hoffmann, Helvetica Chim. Acta, 86, 3525-3532 (2003).
Helicoid Shiftamers for the Transport of π-Clumps and Charges, D.J. Tantillo and R. Hoffmann, Helvetica Chim. Acta, 86, 3525-3532 (2003).
495s_0.pdf
(180.9 KB)
494. Poly[n]prismanes: a Family of Stable Cage Structures with Half-Planar Carbon Centers
R.M. Minyaev, V.I. Minkin, T.N. Gribanova, A.G. Starikov and R. Hoffmann, J. Org. Chem., 68, 8588-8594 (2003).
494s_0.pdf
(249.26 KB)
493. A Conversation on VB vs MO Theory: A Never-Ending Rivalry?
R. Hoffmann, S. Shaik and P.C. Hiberty, Accts. Chem. Res., 36(10), 750-756 (2003).
493s_0.pdf
(54.03 KB)
492. Polyhedral Boranes with exo-Multiple bonds: Three Dimensional Inorganic Analogues of Quinones
M. Balakrishnarajan and R. Hoffmann, Angew. Chem., 42(32), 3777-3781 (2003).
491. The REME Phases: II. What's Possible?
M.D. Bojin and R. Hoffmann, Helv. Chim. Acta, 86, 1683-1708 (2003).
491s_0.pdf
(704.54 KB)
490. The REME Phases: I. An Overview of Their Structural Variety
M.D. Bojin and R. Hoffmann, Helv. Chim. Acta, 86, 1653-1682 (2003).
490s_0.pdf
(687.83 KB)
489. Magic Electron Counts and Bonding in Tubular Boranes
M.M. Balakrishnarajan, R. Hoffmann, P.D.Pancharatna, and E.D. Jemmis, Inorg. Chem., 42(15), 4650-4659 (2003).
489s_0.pdf
(336.59 KB)
488. Prospecting for a 5-Center 4-Electron (C---H---C---H---C)+ Bonding Array
D. Tantillo and R. Hoffmann, J. Amer. Chem. Soc., 125, 4042-4043 (2003).
488._0.pdf
(69.66 KB)
487. Chemistry of Vibronic Coupling, Part 5: Vibronic Coupling in Molecules and in Solids
W. Grochala, R. Hoffmann and P.P. Edwards, Chem. Eur. J., 9(2), 575-587 (2003).
486. A New Quasi-One-Dimensional Ternary Chalcogenide: Synthesis, Crystal Structure, and Electronic Structure of Nb1+xV1-xS5(x=0.18)
H. Yun, G. Ryu, S. Lee, and R. Hoffmann, Inorg. Chem., 42(7), 2253-2260 (2003).
486.pdf
(192.02 KB)
485. Non-classical structures of organic compounds: unusual stereochemistry and hypercoordination
V.I. Minkin, R. M. Minyaev and R. Hoffmann, Russian Chem. Rev., 71, 869-892 (2002).
485s_0.pdf
(1.19 MB)
484. Deformation and Bonding in a Puckered Re-C Square Net
E. Merschrod, A. Courtney and R. Hoffmann, Zeitschrift f. anorg. allgem. Chemie, 628(12), 2757-2763 (2002).
483. Helicoid Shiftamers
D. Tantillo and R. Hoffmann, J. Am. Chem. Soc., 124, 6836-6837 (2002).
483s_0.pdf
(52.67 KB)
482. Sulfur-Gold Orbital Interactions that Determine the Structure of Alkenethiolate/Au(111) Self-Assembled Monolayer Systems
M. Tachibana, K. Yoshizawa, A. Ogawa, H. Fujimoto, and R. Hoffmann, J. Phys. Chem. B, 106, 12727-12736 (2002).
482.pdf
(721.73 KB)
481. Electron-Rich Three-Center Bonding: The Role of s,p Interactions Across the p-Block
M. L. Munzarova and R. Hoffmann, J. Am. Chem. Soc., 124, 4787-4795 (2002).
481s_0.pdf
(129.6 KB)
480. Sigmatropic Shiftamers: Fluxionality in Broken Ladderane Polymers
D. Tantillo and R. Hoffmann, Angew. Chem. Int. Ed., 41(6), 1033-1036 (2002).
479. Strong Electronic Consequences of Intercalation in Cuprate Superconductors: the Case of Trigonal Planar AuI3 Complex Stabilized in the Bi2Sr2CaCu2Oy Lattice
M. Munzarova and R. Hoffmann, J. Am. Chem. Soc., 124, 5542-5549 (2002).
479_0.pdf
(139.38 KB)
478. Electronic Properties of the Silver-Silver Chloride Cluster Interface
S. Glaus, G. Calzaferri and R. Hoffmann, Chem. Eur. J., 8(8), 1785-1794 (2002).
477. Fickle Hexadienes: Manipulating the Relative Energies of Chairlike and Boatlike Transition Structures for the Cope Rearrangement
D. J. Tantillo and R. Hoffmann, J. Org. Chem., 67(5), 1419-1426 (2002).
477.pdf
(231.94 KB)
476. Bcc and Fcc Transition Metals and Alloys: a Central Role for the Jahn-Teller Effect in Explaining their Ideal and Distorted Structures
S. Lee and R. Hoffmann, J. Am. Chem. Soc., 124, 4811-4823 (2002).
476s_0.pdf
(388.72 KB)
475. Band Structure Representations of the Electronic Structure of One-dimensional Materials with Helical Symmetry
W.V. Glassey and R. Hoffmann, Theor. Chem. Acc., 107, 272-281 (2002).
475s_0.pdf
(255.85 KB)
474. Theoretical Approach to Ionic Conductivity in Phosphorus Oxynitride Compounds
H. Rabaa, R. Hoffmann, N.Cruz Hernandez and J. Fernandez Sanz, J. Sol. State Chem., 161, 73-79 (2001).
474.pdf
(559 KB)
473. Disrotatory and Conrotatory Transition Structures for the Fe(CO)3-Templated Rearrangement of Methylenecyclopropane to Trimethylenemethane
D. Tantillo, B. Carpenter and R. Hoffmann, Organometallics, 20, 4562-4564 (2001).
473.pdf
(121.91 KB)
472. Complicated Goings-on in the Metal-Manipulated Ring-Opening of Cyclobutene
D. Tantillo and R. Hoffmann, J. Am. Chem. Soc., 123(40), 9855-9859 (2001).
472.pdf
(157 KB)
471. Demoniac Intervention in the Thermal Electrocyclic Ring-Opening of Cyclobutenes: Fe(CO)3- Complexation of Pericyclic Transition Structures
D. Tantillo and R. Hoffmann, Helvetica Chimica Acta, 84, 1396-1404 (2001).
471.pdf
(396.48 KB)
470. Synthesis and Characterization of SrBi2Se4
Y. Wang, R. Hoffmann and F.J.DiSalvo, J. Solid State Chem., 156, 230-236 (2001).
470.pdf
(281.98 KB)
469. Chemistry of Vibronic Coupling: How to Maximize the Dynamic Diagonal and Off-Diagonal Vibronic Coupling Constants?
W. Grochala and R. Hoffmann in Vibronic Interactions: Jahn-Teller Effect in Crystals and Molecules, M.D. Kaplan & G.O. Zimmerman, eds., pp. 31-46 (2001).
468. Origin of the Broken Conjugation in m-Phenylene Linked Conjugated Polymers
S.Y. Hong, D.Y. Kim, C.Y. Kung, and R. Hoffmann, Macromolecules, 34(18), 6474-6481 (2001).
468.pdf
(112.29 KB)
467. A Comparative Study of the p(2x2)-CO/M(111), M=Pt, Cu, Al Chemisorption Systems
W.V. Glassey and R. Hoffmann, J. Phys. Chem B, 105(16), 3245-3260 (2001).
467.pdf
(234.73 KB)
466. Chemistry of Vibronic Coupling, Part 4: Off-Diagonal Vibronic Coupling Constants across the Peridodic Table
W. Grochala and R. Hoffmann, Polish Journal of Chemistry, 75(11), 1603-1806 (2001).
466s.pdf
(991.4 KB)
465. Real and Hypothetical Intermediate-Valence Fluoride Ag2+/Ag3+ and Ag2+/Ag1+ Systems as Potential Superconductors
W. Grochala and R. Hoffmann, Angew. Chem., 40(15), 2742-2781 (2001).
464. Electron-rich rods as building blocks for Sb strips and Te sheets,
G. Papoian and R. Hoffmann, J. Am. Chem. Soc., 123(27), 6600-6608 (2001).
464.pdf
(239.97 KB)
463. A Molecular Orbital Study of Surface-Adsorbate Interactions during the Oxidation of CO on the Pt(111) Surface
W.V. Glassey and R. Hoffmann, Surface Science, 475, 47-60 (2001).
463.pdf
(347.96 KB)
462. Electron-rich Bonding and the Importance of s,p-mixing as One Moves Across a Period: a Lesson from the LiSn System
A. Ienco, R. Hoffmann and G. Papoian, J. Am. Chem. Soc., 123, 2317-2325 (2001).
462s_0.pdf
(172.04 KB)
461. Structure and Physical Properties of CeSbTe
Y.C. Wang, K.M. Poduska and R. Hoffmann, J. Alloys Compds., 314, 132-139 (2001).
461.pdf
(1.06 MB)
460. Chemistry of Vibronic Coupling, Part 1: How to Maximize Vibronic Coupling Constants in a Diabatic Harmonic Potential Model?
W. Grochala, R. Konecny and R. Hoffmann, Chem. Phys., 265, 153-163 (2001).
460s_0.pdf
(214.6 KB)
459. Chemistry of Vibronic Coupling, Part 2: How to Maximize the Dynamic Diagonal Vibronic Coupling Constant for T1 States in AB Systems (A, B = H, Li, Na, K, Rb, Cs, F, Cl, Br, I)?
W. Grochala and R. Hoffmann, New J. Chem., 25, 108-115 (2001).
459.pdf
(418.94 KB)
458. Chemistry of Vibronic Coupling, Part 3: How One Might Maximize Off-Diagonal Dynamic Vibronic Coupling Constants for Inter-Valence Charge-Transfer (IVCT) States in an ABA1 system (A, B = alkali metal, H, halogen)?
W. Grochala and R. Hoffmann, J. Phys. Chem. A, 104(43), 9740-9749 (2000).
458s_0.pdf
(238.41 KB)
457. A Comparative Study of Hamilton and Overlap Population Methods for the Analysis of Chemical Bonding
W.V. Glassey and R. Hoffmann, J. Chem. Phys., 113(5), 1698-1704 (2000).
457.pdf
(314.71 KB)
456. A comparative theoretical study of the hydrogen, methyl and ethyl chemisorption on the Pt(111) surface,
G. Papoian, J. Norskov, and R. Hoffmann, J. Am. Chem. Soc., 122(17), 4129-4144 (2000).
456s_0.pdf
(625.66 KB)
455. A Remarkably Simple Relationship Connecting the Calculated Geometries of Isomolecular States of Three Different Multiplicities
W. Grochala, A.C. Albrecht and R. Hoffmann, J. Phys. Chem. A, 104(11), 2195-2203 (2000).
455.pdf
(92.39 KB)
454. Hypervalent Bonding in One, Two and Three Dimensions: Extending the Zintl-Klemm Concept to Nonclassical Electron-Rich Networks
G. Papoian and R. Hoffmann, Angew. Chem., 39, 2408-2448 (2000).
453. Generalized Perturbational Molecular Orbital (PMO) Theory
D.-K. Seo, G. Papoian and R. Hoffmann, Intl. J. of Quantum Chem., 77, 408-420 (2000).
453s_0.pdf
(229.55 KB)
452. Metal Fragments and extended arrays on a Si(100)-(2x1) surface: I. Theoretical study of MLn, complexation to Si(100)
R. Konecny and R. Hoffmann, J. Am. Chem. Soc., 121(34), 7918-7924 (1999).
452.pdf
(135.81 KB)
451. Total Energy Partitioning Within a One-electron Formalism: A Hamilton Population Study of Surface—CO Interaction in the c(2x2)-CO/Ni(100) Chemisorption System
W. Glassey, G. Papoian and R. Hoffmann, J. Chem. Phys., 111(9), 893-909 (1999).
450. Theoretical Tracing of a Novel Route from Molecular Precursors through Polymers to Dense, Hard C3N4 Solids
P. Kroll and R. Hoffmann, J. Am. Chem. Soc., 121(19), 4696-4703 (1999).
450s_0.pdf
(151.2 KB)
449. Silylated carbodiimides in molecular and extended structures
P. Kroll, R. Riedel and R. Hoffmann, Phys. Rev. B, 60(5), 3126-3139 (1999).
449.pdf
(499.19 KB)
448. Photographic Sensitization of the AgBr(100) Surface and the Effect of Au and S in Latent Image Formation: A Detailed Theoretical Mechanism
A.-S. Malik, J.T. Blair, W.A. Bernett, F.J. DiSalvo, and R. Hoffmann, J. Sol. State Chem., 146, 516-527 (1999).
448.pdf
(390.11 KB)
447. Electronic and Structural Effects of Nitrogen Doping on the Ionic Conductivity of γ-Li3PO4
H. Rabaâ and R. Hoffmann, J. Solid State Chem., 145, 619-628 (1999).
447.pdf
(491.49 KB)
446. Chemical Bonding in the Ternary Transition Metal Bismuthides Ti4TBi2 with T=Cr, Mn, Fe, Co, and Ni
R. Rytz and R. Hoffmann, Inorg. Chem., 38(7) 1609-1617 (1999).
446s_0.pdf
(236.08 KB)
445. Polyboride Networks, Molybdenum Clusters and Uranium Bonding
F. Erica, S. Merschrod and R. Hoffmann, Chem. Mat., 11(2), 341-351 (1999).
445.pdf
(229.5 KB)
444. What do the Kohn-Sham orbitals and eigenvalues mean?
R. Stowasser and R. Hoffmann, J. Am. Chem. Soc., 121(14), 3414-3420 (1999).
444s_0.pdf
(109.84 KB)
443. What Determines the Structures of the Group 15 Elements?
D.K. Seo and R. Hoffmann, J. Sol. State Chem., 147, 26-37 (1999).
443.pdf
(369.95 KB)
442. Direct and Indirect Band Gap Types in One-Dimensional Conjugated or Stacked Organic Materials
D.K. Seo and R. Hoffmann, Theor. Chem. Acc., 102, 23-32 (1999).
442.pdf
(316.36 KB)
441. The Dithiacyclooctane Cation (DTCO+): Conformational Analysis, Interconversion Barriers and Bonding
R. Stowasser, R.S. Glass and R. Hoffmann, J. Chem. Soc., Perkin Trans., 2, 1559-1561 (1999).
441.pdf
(113.91 KB)
440. Hydrogen on the Fe(110) Surface and Near Bulk BCC Fe Vacancies: A Comparative Bonding Study
A. Juan and R. Hoffmann, Surf. Sci., 421, 1-16 (1999).
440.pdf
(266.3 KB)
439. C5H5 on a Pt(111) Surface: Electronic Structure and Bonding
G. Brizuela and R. Hoffmann, J. Phys. Chem. A, 102(47), 9618-9624 (1998).
439.pdf
(105.06 KB)
438. Intermolecular Interactions Between Hypervalent Molecules: Ph2IX and XF3 (X=Cl, Br, I) Dimers
G.A. Landrum, N. Goldberg and R. Hoffmann, New J. Chem., 883-890 (1998).
438s_0.pdf
(321.27 KB)
437. The TiNiSi Family of Compounds: Structure and Bonding
G.A. Landrum, J. Evers, H. Boysen and R. Hoffmann, Inorg. Chem., 37(22), 5754-5763 (1998).
437s_0.pdf
(418.33 KB)
436. Silicon Boron Nitrides: Hypothetical Polymorphs of Si3B3N7
P. Kroll and R. Hoffmann, Angew. Chem., 37(18), 2527-2530 (1998).
435. Secondary Bonding between Chalcogens or Pnicogens and Halogens
G.A. Landrum and R. Hoffmann, Angew. Chem., 37(13/14), 1887-1890 (1998).
434. Magic Electron Counts for Networks of Condensed Clusters: Vertex-Sharing Aluminum Octahedra
G.V. Vajenine and R.Hoffmann, J. Amer. Chem. Soc., 120(17), 4200-4208 (1998).
434s_0.pdf
(237.16 KB)
433. Bonding in an Unusual Nickel Carbide
E.F. Merschrod, S.H. Tang and R. Hoffmann, Z. Naturfor., 53b, 322-332 (1998).
433s_0.pdf
(12.88 MB)
432. A Detailed Theoretical Mechanism for Photographic Sensitization of the AgBr(111) Surface
A.S. Malik, J.T. Blair, F.J. DiSalvo and R. Hoffmann, J. Imaging Science and Technology, 42(3), 210-215(1998).
432s.pdf
(213.83 KB)
431. Theoretical Investigation of [2,2]-Paracyclophane as a Donor in Relation to the Cr(CO)3 Group
G.A. Papoyan, K.P. Butin, R. Hoffmann and V.I. Rozenberg, Izvest. Akad. Nauk., Ser. Khim., 151-157 (1998); Russ. Chem. Bull., 47, 153-159 (1998).
430. Building up Complexity from Strips and Sheets-- the Electronic Structure of the La12Mn2Sb300 Alloy
Building up Complexity from Strips and Sheets -- the Electronic Structure of the La12Mn2Sb300 Alloy,
430.pdf
(960.3 KB)
429. Qualitative Thinking in the Age of Modern Computational Chemistry, or What Lionel Salem Knows
R. Hoffmann, J. Mol. Str. (Theochem.), 424, 1-6 (1998).
429s_0.pdf
(558.64 KB)
428. Is CO a Special Ligand in Organometallic Chemistry? Theoretical Investigation of AB, Fe (CO)4(AB) and Fe(AB)5 (AB = N2, CO, BF, SiO)
U. Radius, F.M. Bickelhaupt, A.W. Ehlers, N. Goldberg and R. Hoffmann, Inorg. Chem., 37, 1080-1090 (1998).
428s_0.pdf
(143.11 KB)
427. Might BF and BNR2 be Alternatives to CO? A Theoretical Quest for New Ligands in Organometallic Chemistry
F.M. Bickelhaupt, U. Radius, A.W. Ehlers, R. Hoffmann and E.J. Baerends, New J. Chem., 1-3 (1998).
427s_0.pdf
(253.54 KB)
426. Theoretical Tinkering: The Search for Magnetically Ordered Organic Polymers Built From Sulfur, Carbon, Nitrogen-Containing Five-Membered Rings
H. Genin and R. Hoffmann, Macromolecules, 31, 444-455 (1998).
426s_0.pdf
(221.17 KB)
425. On "Forbidden" Four - Center Reactions: Molecular Orbital Considerations for N2 + N2 and N2 + N+2
F.M. Bickelhaupt, R. Hoffmann and R.D. Levine, J. Phys. Chem. A., 101, 8255-8263 (1997).
425.pdf
(283.72 KB)
424. Origin of the Metal-to-Insulator Transition in H0.33MoO3
Origin of the Metal-to-Insulator Transition in H0.33MoO3
424.pdf
(199.83 KB)
423. Dioxygen Cleavage and Methane Activation on Diiron Enzyme Models: A Theoretical Study
K. Yoshizawa, T. Ohta, T. Yamabe and R. Hoffmann, J. Amer. Chem. Soc., 119, 12311-12321 (1997).
423.pdf
(426 KB)
422. Bonding in the Trihalides (X-3), Mixed Trihalides (X2Y-), and Hydrogen Bihalides (X2H-). The Connection Between Hypervalent, Electron-Rich Three-Center, Donor-Acceptor, and Strong Hydrogen Bonding
G.A. Landrum, N. Goldberg and R. Hoffmann, J. Chem. Soc., Dalton Trans., 3605-3613 (1997).
422s_0.pdf
(154.18 KB)
421. The Electronic Structure of [Te15Br4][MoOBr4]2 and Some General Aspects of Bonding in Classical and Hypervalent Tellurium Halides
G.A. Landrum, N. Goldberg and R. Hoffmann, Chem. Ber., 130, 463-471 (1997).
420. Electronic Structure and Bonding in BaNi2P4
A.A. Palacios, P. Alemany, S. Alvarez and R. Hoffmann, Anales de Quimica Int. Ed., 93, 385-393 (1997).
420.pdf
(6.24 MB)
419. Orbital Interaction Analysis of McConnell's Model for Through-Space Magnetic Coupling
K. Yoshizawa, T. Yamabe, R. Hoffmann, Mol. Cryst. Liq. Cryst., 305, 157-166 (1997).
418. Sulfur Multicenter Bonding and Distortions in a Hypothetical Polydithioquinone
M.V. Velikanov, H. Genin and R. Hoffmann, Chem. Mater., 9, 573-579 (1997).
418.pdf
(361.45 KB)
417. Possible Intermediates for the Conversion of Methane to Methanol on Dinuclear Iron Centers of Methane Monooxygenase Models
K. Yoshizawa, T. Yamabe and R. Hoffmann, New J. Chem., 21, 151-161 (1997).
416. Synthesis and Solid State Chemistry of CH3BiI2: A Structure with an Extended One-Dimensional Organometallic Framework
S. Wand, D.B. Mitzi, G.A. Landrum, H. Genin and R. Hoffmann, J. Amer. Chem. Soc., 119, 724-732 (1997).
416s_0.pdf
(430.56 KB)
415. The d2M(NR)2 Fragment, High Valent and Low Valent Organometallic Equivalents, and on Unusual Mode of Ethylene Complexation
U. Radius and R. Hoffmann, Chem. Ber., 129, 1345-1353 (1996).
414. MC4: A Hypothetical Three-Dimensional Organometallic Net with Metal-Metal Bonding and Polyacetylene Substructures
N. Goldberg, H. Tang, N. Krooks and R. Hoffmann, J. Amer. Chem. Soc., 118, 10294-10302 (1996).
414.pdf
(598.89 KB)
413. The Four-Connected Net in the CeCu2 Structure and its Ternary Derivatives. Its Electronic and Structural Properties
G. Nuspl, K. Polborn, J. Evers, G. A. Landrum and R. Hoffmann, Inorg. Chem., 35, 6922-6932 (1996).
413s_0.pdf
(1.3 MB)
412. Electronic Structure, Bonding and Electrical Properties of MoNiP8 and WNiP8
M. Llunell, S. Alvarez, P. Alemany and R. Hoffmann, Inorg. Chem., 35, 4683-4689 (1996).
412.pdf
(693.27 KB)
411. Warwickites: Electronic Structure and Bonding
M. Matos, R. Hoffmann, A. Latgé and E.V. Anda, Chem. Mat., 8, 2324-2330 (1996).
411.pdf
(614.92 KB)
410. The Fivefold Coordinate Carbon Center and Zr to H, B, and C. Bonding in a Zirconocene Complex
U. Radius, S. J. Silverio, R. Hoffmann and R. Gleiter, Organometallics, 15, 3737-3745 (1996).
410.pdf
(296.77 KB)
409. Hypothetical C60 Metal-Cluster Fullerides and Some General Aspects of Tetrahedral Cluster Bonding
N. Goldberg and R. Hoffmann, Inorg. Chem., 35 4369-4377 (1996).
409s_0.pdf
(260.8 KB)
408. Dioxygen Binding to Dinuclear Iron Centers on Methane Monooxygenase Models
K. Yoshizawa and R. Hoffmann, Inorg. Chem., 35, 2409-2410 (1996).
408.pdf
(112.09 KB)
407. A 2,3-Connected Tellurium Net and the Cs3Te22 Phase
Q. Liu, N. Goldberg and R. Hoffmann, Chem. Eur. J., 2, 390-397 (1996).
406. Theoretical Aspects of the Adhesion of Metals to Oxides and Nitrides, P. Alemany, R.S. Boorse, J.M. Burlitch, R. Hoffmann, in Chemical Physics on the Border of the XXXI Century, Moscow, Nauka, 1996, pp. 89-103.
Theoretical Aspects of the Adhesion of Metals to Oxides and Nitrides, P. Alemany, R.S. Boorse, J.M. Burlitch and R. Hoffmann, in Chemical Physics on the Border of the XXXI Century, Moscow, Nauka, 1996, pp. 89-103.
405. Hypothetical Three-Dimensional Metallic Compounds of C60 with Transition Metal Clusters
N. Goldberg and R. Hoffmann, J. Amer. Chem. Soc., 118, 3315-3316 (1996).
405s_0.pdf
(81.07 KB)
404. Polyamidoimidonitride Clusters of Zirconium-- A Molecular Orbital Study
K.A. Lawler, R. Hoffmann, M.M. Banaszak Holl, and P.T. Wolczanski, Z. Anorg. Allg. Chem., 622, 392-400 (1996).
403. Electronic Structure of [Ta5(NH)4Cl17]6- - A Cluster with a Distorted Square Pyramidal Ta5 Core
K.A. Lawler and R. Hoffmann, Inorg. Chem., 35, 1431-1436 (1996).
403.pdf
(169.98 KB)
402. Compounds Containing Copper-Sulfur Layers: Electronic Structure, Conductivity, and Stability
G.V. Vajenine and R. Hoffmann, Inorg. Chem., 35, 451-457 (1996).
402.pdf
(185.5 KB)
401. The Electronic Structures and Magnetic Properties of One-Dimensional ABO6 Chains in Sr3ABO6 (A = Co, Ni; B = Pt,Ir) and Two-Dimensional MO3 Sheets in InMO3 (M = Fe, Mn)
G.V. Vajenine, R. Hoffmann and H.-C. zur Loye, Chemical Physics, 204, 469-478 (1996).
401.pdf
(731.09 KB)
400. Polythiene, a Novel Hypothetical Carbon-Sulfur Polymer
H. Genin and R. Hoffmann, J. Amer. Chem. Soc., 117, 12328-12335 (1995).
400s_0.pdf
(1.41 MB)
399. Theoretical Aspects of a Novel Mode of Hydrogen-Hydrogen Bonding
Q. Liu and R. Hoffmann, J. Amer. Chem. Soc., 117, 10108-10112 (1995).
399.pdf
(472.78 KB)
398. Interchain Interactions in One-Dimensional Periodic Systems: An Analysis of Second-Order Effects Causing Deformation
K. Yoshizawa and R. Hoffmann, J. Chem. Phys., 103, 2126-2131 (1995).
398.pdf
(396.09 KB)
397. Potential Linear Chain Organic Ferromagnets
K. Yoshizawa and R. Hoffmann, Chem. Eur. J., 1, 403-413 (1995).
potential linear chain.pdf
(1.13 MB)
396. The Role of Orbital Interactions in Determining Ferromagnetic Coupling in Organic Molecular Assemblies
K. Yoshizawa and R. Hoffmann, J. Amer. Chem. Soc., 117, 6921-6926 (1995).
396s_0.pdf
(699.45 KB)
395. The Bare and Acetylene Chemisorbed Si(001) Surface, and the Mechanism of Acetylene Chemisorption
Q. Liu and R. Hoffmann, J. Amer. Chem. Soc., 117, 4082-4092 (1995).
395.pdf
(1.06 MB)
394. An Approach to Understanding Bond Length/Bond Angle Relationship
W.A. Shirley, R. Hoffmann and V.S. Mastryukov, J. Phys. Chem., 99, 4025-4033 (1995).
394.pdf
(1.55 MB)
393. Polymeric Methyltrioxorhenium -- Some Models for its Electronic Structure
H.S. Genin, K.A. Lawler, R. Hoffmann, W.A. Herrmann, R.W. Fischer and W. Scherer, J. Amer. Chem. Soc., 117, 3244-3252 (1995).
393s_0.pdf
(782.87 KB)
392. Permethylated metallocenes as suitable models for the preparation of onium mono- and dications
M.I. Rybinskaya, A.Z. Kreindlin, R. Hoffmann and R.M. Minyaev, Izv. Akad. Nauk., Ser. Khim, 43, 1701-1708 (1994).
391. A Hypothetical Dense 3,4-Connected Carbon Net and Related B2C and CN2 Nets Built From 1,4-Cyclohexadienoid Units
M.J. Bucknum and R. Hoffmann, J. Amer. Chem. Soc., 116, 11456-11464 (1994).
391s_0.pdf
(910.86 KB)
390. Spin-State Isomers and Bond Stretch Isomers: A Comment on the Article "Bond- Stretch Isomers: Fact not Fiction,"
G. Parkin and R. Hoffmann, Angew. Chem. Int. Ed. Engl., 33, 1462 (1994).
389. Distortions of Gallium Octahedra in Ba5Ga6 and the Likelihood of the Reported Phase Being Ba5Ga6H2
Q. Liu, R. Hoffmann and J.D. Corbett, J. Phys. Chem., 98, 9360-9364 (1994).
389.pdf
(470.13 KB)
388. Dications of the Type 1,1'-[(C5Me4CH2)2M]2+ and [1,2(CH2)2C5Me3MC5Me5]2+ for the Iron Subgroup; 1H NMR-Spectra and Determination of Possible Rotamers for the 1,1'-Dications
M.I. Rybinskaya, A.Z. Kreindlin, P.V. Petrovskii, R.M. Minyaev and R. Hoffmann, Organometallics, 13, 3903-3908 (1994).
388.pdf
(594.42 KB)
387. A Theoretical Study of Crystallochromy. Quantum Interference Effects in the Spectra of Perylene Pigments
P.M. Kazmaier and R. Hoffmann, J. Amer. Chem. Co., 116, 9684-9691 (1994).
387s_0.pdf
(3.95 MB)
386. Possible Hard Materials Based on Interpenetrating Diamond-Like Networks, D.M. Proserpio, R. Hoffmann, P. Preuss, J. Amer. Chem. Soc., 116, 9634-7 (1994).
Possible Hard Materials Based on Interpenetrating Diamond-Like Networks, D.M. Proserpio, R. Hoffmann and P. Preuss, J. Amer. Chem. Soc., 116, 9634-9637 (1994).
386.pdf
(1022.51 KB)
385. Crystal Orbital Displacement Analysis of Interactions in the Solid State. Applications to the Study of Host...Guest Interactions in the Hofmann Clathrates
E. Ruiz, S. Alvarez, R. Hoffmann and J. Bernstein, J. Amer. Chem. Soc., 116, 8207-8221 (1994).
385.pdf
(3.26 MB)
384. Adhesion of Rhodium, Palladium and Platinum to Alumina and Nitric Oxide Reactions on the Resulting Surfaces: Model Calculations
T.R. Ward, P. Alemany and R. Hoffmann, in Environmental Catalysis, ed. J.N. Armor, ACS Symposium Series 552, American Chemical Society, Washington, 1994, pp. 140-157.
383. Ternary Group VIII Hydrides: Ligand Field and Cation Orbital Effects in their Electronic Structures
G.J. Miller, H. Deng and R. Hoffmann, Inorg. Chem., 33, 1330-1339 (1994).
383s_0.pdf
(1.6 MB)
382. A Chemical and Theoretical Approach to Bonding on Surfaces
R. Hoffmann, J. Phys.:Condens. Mat., 5, 1-17 (1993).
381. [Ni(P-tBu)6] and [Ni(SiH2)6] Are Isolobal, Related to [In{Mn(CO)4}5]2-, and Have 16-Electron Counts
H. Tang, D.M. Hoffman, T.A. Albright, H. Deng and R. Hoffmann, Angew. Chem. Int. Ed. Engl., 32, 1616-1618 (1993).
380. Toroidal Nickel Thiolates; Structure and Bonding
P. Alemany and R. Hoffmann, J. Amer. Chem. Soc., 115, 8290-8297 (1993).
380.pdf
(1.93 MB)
379. Pyramidality and Metal-Metal Multiple Bonding: Structural Correlations and Theoretical Study
F. Moto, J.J. Novoa, J. Losada, S. Alvarez, R. Hoffmann and J. Silvestre, J. Amer. Chem. Soc., 115, 6216-6229 (1993).
379s_0.pdf
(3.26 MB)
378. How N2 Might Be Activated by the FeMo-Cofactor in Nitrogenase
H. Deng and R. Hoffmann, Angew. Chem., 105, 1125-1127 (1993); Angew. Chem. Int. Ed. Engl., 32, 1062-1064 (1993).
377. Adhesion of Rhodium, Palladium and Platinum to Alumina, and the Reduction of NO on the Resulting Surfaces: A Theoretical Analysis
T.R. Ward, P. Alemany and R. Hoffmann, J. Phys. Chem., 97, 7691-7699 (1993).
377.pdf
(1.51 MB)
376. The Potassium Promoter Function in the Oxidation of Graphite: An Experimental and Theoretical Study
C. Janiak, R. Hoffmann, P. Sjövall and B. Kasemo, Langmuir, 9, 3427-3440 (1993).
376.pdf
(5.07 MB)
375. The Electronic Structure of DyGe3
Katrin Albert, H.-Jürgen Meyer and R. Hoffmann, J. Sol. State Chem., 106, 201-210 (1993).
375.pdf
(342.79 KB)
374. Rhenium-Carbon Bonding in Er2ReC2, an Organometallic Polymer in the Solid State
H. Deng and R. Hoffmann, Inorg. Chem., 32, 1991-1996 (1993).
374s_0.pdf
(553.34 KB)
373. Theoretical Study of Transition Metal Adhesion on Doped Al2O3
P. Alemany, R.S. Boorse, J.M. Burlitch and R. Hoffmann, Chem. Mater., 5, 465-471 (1993).
373.pdf
(788.47 KB)
372. Metal-Ceramic Interface Adhesion: Band Structure Calculations on Pt-NiO Couples
R.S. Boorse, P. Alemany, J.M. Burlitch and R. Hoffmann, Chem. Mater., 5, 459- 464 (1993).
372.pdf
(1.76 MB)
371. Metal-Ceramic Adhesion: Quantum Mechanical Modeling of Transition Metal- Al2O3 Interfaces
P. Alemany, R.S. Boorse, J.M. Burlitch and R. Hoffmann, J. Phys. Chem., 97, 8464-8475 (1993).
371s_0.pdf
(1.48 MB)
370. A Theoretical Study of the Initial Stages of Si(111)-7x7 Oxidation. 2: The Dissociated State and Formation of SiO4, B. Schubert, P. Avouris and R. Hoffmann, J. Chem. Phys., 98, 7606-7612 (1993).
A Theoretical Study of the Initial Stages of Si(111)-7x7 Oxidation. 2: The Dissociated State and Formation of SiO4, B. Schubert, P. Avouris and R. Hoffmann, J. Chem. Phys., 98, 7606-7612 (1993).
370.pdf
(729.32 KB)
369. A Theoretical Study of the Initial Stages of Si(111)-7x7 Oxidation. 1: The Molecular Precursor
, B. Schubert, P. Avouris and R. Hoffmann, J. Chem. Phys., 98, 7593-7605 (1993).
369.pdf
(1.22 MB)
368. Dilead Structural Units in Lead Halide and Hydroxo/oxo Molecules, Clusters and Extended Structures Found in Molten Salts, Aqueous Solutions and the Solid State
L.A. Bengtsson and R. Hoffmann, J. Amer. Chem. Soc., 115, 2666-2676 (1993).
368.pdf
(1.4 MB)
367. Coupling Nitrosyls as the First Step in the Reduction of NO on Metal Surfaces. The Special Role of Rhodium
T.R. Ward, R. Hoffmann and M. Shelef, Surface Science, 289, 85-99 (1993).
367.pdf
(1.44 MB)
366. Towards a Theory of the Room-Temperature Organometallic Charge-Transfer Ferromagnet
A.L. Tchougreeff and R. Hoffmann, J. Phys. Chem., 97, 350-356 (1993).
366.pdf
(768.41 KB)
365. Charge and Spin Density Waves in the Electronic Structure of Graphite. Application to Analysis of STM Images
A.L. Tchougreeff and R. Hoffmann, J. Phys. Chem., 96, 8993-8998 (1992).
365.pdf
(795.58 KB)
364. Structure-Bonding Relationships in the Laves Phases
R.L. Johnston and R. Hoffmann, Z. anorg. allg. Chem., 616, 105-120 (1992).
363. Structural Preferences Among the Rare Earth Dicarbides: The Electronic Structure of LaC2 and ThC2
J.R. Long, J.-F. Halet, J.-Y. Saillard, R. Hoffmann, and H.- J. Meyer, New J. Chem., 16, 839-846 (1992).
362. Introduction to the Electronic Structure of Extended Systems
R. Hoffmann in Modern Perspectives in Inorganic Crystal Chemistry, ed. E. Parthé, Kluwer Academic Publishers, Dordrecht, 1992, pp. 97-116.
361. A Theoretical Way of Aiding the Design of Solid State Syntheses
R. Dronskowski and R. Hoffmann, Advanced Materials, 4, 514-521 (1992).
361s_0.pdf
(868.75 KB)
360. Bond Reactivities, Acidities, and Basicities within AMo3X3 Phases (A = Li, Na, K, In; X = Se, Te)
R. Dronskowski and R. Hoffmann, Inorganic Chem., 31, 3107-3113 (1992).
360s_0.pdf
(776.68 KB)
359. Distortions in the Structure of Calcium Carbide: A Theoretical Investigation
J.R. Long, H.-J. Meyer and R. Hoffmann, Inorg. Chem., 31, 1734-1740 (1992).
359.pdf
(612.39 KB)
358. Theoretical Aspects of Photoinitiated Chemisorption, Dissociation and Desorption of O2 on Pt(111
A.W.E. Chan, R. Hoffmann and W. Ho, Langmuir, 8, 1111-1119 (1992).
358.pdf
(1.73 MB)
357. An Orbital Analysis of Hydrogen Pairing in Non-Stoichiometric Transition Metal Hydrides
J.-F. Halet, J.-Y. Saillard, C. Koudou, C. Minot, Z. Nomikou, R. Hoffmann, and C. Demangeat, Chem. Mater., 4, 153-161 (1992).
357.pdf
(919.38 KB)
356. Molecular Mechanism of Photosynthetic Oxygen Evolution: A Theoretical Approach
D. Proserpio, R. Hoffmann, and G.C. Dismukes, J. Amer. Chem. Soc., 114, 4374- 4382 (1992).
356.pdf
(3.12 MB)
355. Relationships Between Extended Structures and Molecular Clusters of Ni and Te
Z. Nomikou, B. Schubert, R. Hoffmann and M.L. Steigerwald, Inorg. Chem., 31, 2201- 2209 (1992).
355.pdf
(2.26 MB)
354. Bonding in Halocuprates
L. Subramanian and R. Hoffmann, Inorg. Chem., 31, 1021-1029 (1992).
354s_0.pdf
(829.26 KB)
353. Investigation of the Si(111)-((√3 x √3))R30°-Boron Surface Reconstruction by Simulated Annealing
Y.-T. Wong, B. Schubert and R. Hoffmann, J. Amer. Chem. Soc., 114, 2367-2371 (1992).
353.pdf
(685.62 KB)
352. The Electronic Structure of Two Novel Carbides, Ca3Cl2C3 and Sc3C4, Containing C3 Units
H.-J. Meyer and R. Hoffmann, Z. anorg. allg. Chem., 607, 57-71 (1992).
351. Studies of the Linkage and Bonding of Triatomics in Transition Metal Complexes. Part 2. NCS Complexes
D.F.-T. Tuan, J.W. Reed, and R. Hoffmann, J. Mol. Str. (Theochem.), 232, 111-121 (1991).
351.pdf
(608.16 KB)
350. From Chemisorption to Mechanism on Surfaces: An Exploration of the Pyrolysis of Triisobutylaluminum in the Chemical Vapor Deposition of Aluminum Thin Films
A.-W. E. Chan and R. Hoffmann, J. Vac. Sci. & Technol. A, 1569-1580 (1991).
350.pdf
(1.04 MB)
349. Anomalous electronic behavior in the layered halides Pr2X5; X=Br,I
H.-J. Meyer and R. Hoffmann, J. Solid State Chem., 95, 14-20 (1991).
349.pdf
(541.28 KB)
348. Surface Assisted Xe-Xe Bonding?
R. Hoffmann, M. Kersting and Z. Nomikou, J. Phys. Chem., 95, 4033-4037 (1991).
348s_0.pdf
(489.92 KB)
347. The Xe-Cl2 Conundrum: van der Waals Complex or Linear Molecule?
D.M.Proserpio, R. Hoffmann and K.C. Janda, J. Amer. Chem. Soc., 113, 7184-7189 (1991).
347.pdf
(1.17 MB)
346. Tri-tert-butylsilylimido Complexes of Titanium: Benzene C-H Activation and Structure of [(tBu3SiNH)Ti]2(µ-NSitBu3)2
C. C. Cummins, C.P. Schaller, G. D. Van Duyne, P. T. Wolczanski, E.A.-W. Chan and R. Hoffmann, J. Amer. Chem. Soc., 113, 2985-2994 (1991).
346.pdf
(1.33 MB)
345. Transition Metal Borides with the Ta3B4 Crystal Structure; Their Electronic and Bonding Properties
R. M. Minyaev, and R. Hoffmann, Chemistry of Materials, 3, 547- 557 (1991).
345.pdf
(2.24 MB)
344. A Chemical Approach to the Orbitals of Organic Polymers
R. Hoffmann, C. Janiak and C. Kollmar, Macromolecules, 24, 3725-3746 (1991).
344s_0.pdf
(2.12 MB)
343. The Symmetrical Octasilsesquioxanes X8Si8O12: Electronic Structure and Reactivity
G. Calzaferri and R. Hoffmann, J. Chem. Soc. Dalton Trans., 917-928 (1991).
343.pdf
(1.28 MB)
342. Molecular Orbital Analysis of the Orientation-Dependent Barrier to Direct Exchange Reactions
D. Proserpio, R. Hoffmann and R. D. Levine, J. Amer. Chem. Soc., 113, 3217-3225 (1991).
342.pdf
(1.19 MB)
341. Some Hypothetical Allotropes of Carbon
R. Hoffmann, in B. C. Anderson, Y. Imanishi (eds.), Progress in Polymer Science, Springer-Verlag Berlin Heidelberg, 379-380 (1991).
340. Structure and Bonding in Cationic Cyclopentadienyliron Complexes Containing Thio-, Seleno-, and Telluroethers as Ligands
H. Schumann, A. M. Arif, A. L. Rheingold, C. Janiak, R. Hoffmann and N. Kuhn, Inorg. Chem., 30, 1618-1625 (1991).
340.pdf
(2.27 MB)
339. The Electronic Structure of a [Tc2(µ-O)3Cp]n Polymer with a Very Short Metal- Metal Bond
A.W. Edith Chan, R. Hoffmann and S. Alvarez, Inorg. Chem., 30, 1086- 1093 (1991).
339.pdf
(833 KB)
338. Synthesis, NMR Spectra and Molecular Orbital Calculations of Ru and Os Dications of the Type [C5Me5MC5Me3(CH2)2]2+
A. Z. Kreidlin, E. I. Fedin, P. V. Petrovskii, M. I. Rybinskaya, R. M. Minyaev and R. Hoffmann, Organometallics, 10, 1206-1209 (1991).
338.pdf
(448.95 KB)
337. B. Schiøtt, K. A. Jørgensen and R. Hoffmann, J. Phys. Chem., 95, 2297-2307 (1991).
B. Schiøtt, K. A. Jørgensen and R. Hoffmann, J. Phys. Chem., 95, 2297-2307 (1991).
337.pdf
(1.16 MB)
336. Chemisorption of Carbon Monoxide on Three Metal Surfaces: Ni(111), Pd(111) and Pt(111): A Comparative Study
Y.-T. Wong and R. Hoffmann, J. Phys. Chem., 95, 859-867 (1991).
336s_0.pdf
(1.12 MB)
335. A One-Electron Perturbation Theory of Chemisorption
M. V. Basilevsky and R. Hoffmann, J. Chem. Phys., 93(5), 3635-3644 (1990).
335.pdf
(901.32 KB)
334. The World of Chemistry
R. Hoffmann, Chem. Educ., 7(1), 16-17 (1990); also published in International Newsletter on Chemical Education, 33, June 1990.
334.pdf
(2.08 MB)
333. The Large Range of Cr-Cr Quadruple Bond Distances: Structural and Theoretical Analysis
J. Losada, S. Alvarez, J. J. Novoa, F. Mota, R. Hoffmann and J. Silvestre, J. Amer. Chem. Soc., 112, 8998-9000 (1990).
333s_0.pdf
(409.14 KB)
332. Molecules Waiting to be Made
R. Hoffmann, New Scientist, 17, 44-48 (1990). Also in abbreviated form in Physica A177, 22-23 (1991). In Russian, Zh. Vsesoyuz. Khim. Obshches. im. Mendeleeva, 36, 261-264 (1991).
331. Elucidation of the Initial Stages of the Oxidation of Si(111) Using Scanning Tunneling Microscopy and Spectroscopy
I.-W. Lyo, Ph. Avouris, B. Schubert and R. Hoffmann, J. Phys. Chem., 94, 4400-4403 (1990).
331.pdf
(1 MB)
330. A Comparative Study of the Chemisorption of Ethylene on Three Metal Surfaces: Ni(111), Pd(111) and Pt(111)
Y.-T. Wong and R. Hoffmann, J. Chem. Soc. Faraday Trans., 86(24), 4083-4094 (1990).
330s_0.pdf
(1.24 MB)
329. Polyisocyanides: Electronic or Steric Reasons for Their Helical Structure?
C. Kollmar and R. Hoffmann, J. Amer. Chem. Soc., 112, 8230-8238 (1990).
329s_0.pdf
(1.01 MB)
328. Electronic and Structural Properties of the Novel Chain Compound Ta4Te4Si
J. Li, R. Hoffmann, M. E. Badding and F. J. DiSalvo, Inorg. Chem., 29, 3944-3952 (1990).
328s_0.pdf
(984.79 KB)
327. TlI-TlI and InI-InI Interactions: From the Molecular to the Solid State
C. Janiak and R. Hoffmann, J. Amer. Chem. Soc., 112, 5924-5946 (1990).
327s_0.pdf
(2.56 MB)
326. The Electronic Structure of Ba7Ga4Sb9, A Compound Seemingly Probing the Limits of the Zintl Concept
P. Alemany, S. Alvarez and R. Hoffmann, Inorg. Chem., 29, 3071-3073 (1990).
326s_0.pdf
(394.28 KB)
325. Bonding in the Two-Dimensional Cu-Ga Layer of a Ca2Cu2Ga Crystal
, C. Kollmar and R. Hoffmann, Inorg. Chem., 29, 2467-2475 (1990).
325s_0.pdf
(1.76 MB)
324. Ethylidyne on the Rh(100) Surface; A Theoretical Investigation
B. Schiøtt, M. K. Awad, A. B. Anderson and R. Hoffmann, Langmuir, 6, 806-816 (1990).
324.pdf
(1.22 MB)
323. A Simple Way to Understand the Electronic Structures of the Tl-Ba-Ca-Cu-O High Tc Superconductors
Y.-T. Wong, A.-W. E. Chan and R. Hoffmann, Int. J. Mod. Phys. B, 4(4), 677-699 (1990).
322. The Kagomé Net: Band Theoretical and Topological Aspects
R. L. Johnston and R. Hoffmann, Polyhedron, 9(15/16), 1901-1911 (1990).
322s_0.pdf
(13.51 MB)
321. Ge-Ge Bonding in the High-Pressure Modification of Lithium Germanide -- A Near-Zintl Phase
P. Sherwood and R. Hoffmann, J. Amer. Chem. Soc., 112, 2881-2886 (1990).
321.pdf
(727.65 KB)
320. A Theoretical Study of Chemisorption of Acetylene on the Cu(100) Surface
Y.-T. Wong and R. Hoffmann, J. Chem. Soc. Faraday Trans., 86, 553-559 (1990).
320s_0.pdf
(772.54 KB)
319. Electronic Structure of the Non-Classical Trimetallic Alkyne Cluster Complex Os3(CO)9(µ-H)2(µ3-HC2NEt2)
Z. Nomikou, J.-F. Halet, R. Hoffmann, J. T. Tanner and R. D. Adams, Organometallics, 9, 588-595 (1990).
319.pdf
(962.07 KB)
318. A Helical Face-Sharing Tetrahedron Chain with Irrational Twist, Stella Quadrangula and Related Matters
C. Zheng, R. Hoffmann and D. R. Nelson, J. Amer. Chem. Soc., 112, 3785-3791 (1990).
318s_0.pdf
(841.36 KB)
317. Coadsorption of Carbon Monoxide and Hydrogen on the Ni(100) Surface: A Theoretical Investigation of Site Preferences and Surface Bonding
J. Li, B. Schiøtt, R. Hoffmann and D. M. Proserpio, J. Phys. Chem., 94, 1554-1564 (1990).
317.pdf
(1.23 MB)
316. Adsorption and Coadsorption of CO and NO on the Rh(100) Surface: A Theoretical Analysis
D. Lj. Vuckovic, S. A. Jansen and R. Hoffmann, Langmuir, 6, 732-746 (1990).
316.pdf
(1.79 MB)
315. Oxygen Transfer to Ethylene Catalyzed by the Ag(110) Surface
K. A. Jørgensen and R. Hoffmann, J. Phys. Chem., 94, 3046-3054 (1990).
315.pdf
(1.06 MB)
314. PF3, PF2 and PF on Ni(111): Theoretical Aspects of Their Chemisorption
A.-W. E. Chan and R. Hoffmann, J. Chem. Phys., 92, 699-708 (1990).
314s_0.pdf
(912.32 KB)
313. The Coupling of Thionitrosyls and Nitrosyls on Rhenium Fragments; A Molecular Orbital Analysis
M. Kersting and R. Hoffmann, Inorg. Chem., 29, 279-284 (1990).
313.pdf
(683.8 KB)
312. Adsorption and Reactions of Cyclic Sulfides on Mo(110)
M. J. Calhorda, C. M. Friend and R. Hoffmann, J. Amer. Chem. Soc., 112, 50-61 (1990).
312.pdf
(1.33 MB)
311. Progress in Linear Optics, Non-Linear Optics and Surface Alignment of Liquid Crystals
H. L. Ong, R. B. Meyer, A. J. Hurd, A. J.Karn, M. Arakelian, Y. R. Shen, P. N. Sanda, D. B. Dove, S. A. Jansen and R. Hoffmann, Mol. Cryst. Liq. Cryst., 179, 365-375 (1990).
310. TlI-TlI Interactions in the Molecular State : An MO Analysis
C. Janiak and R. Hoffmann, Angew. Chem., 101, 1706-1708 (1989); Angew. Chem. Int. Ed. Engl., 28, 1688-1690 (1989).
309. Covalent Effects in Molecule-Surface Charge Exchange: O2 on Ag(111)
M. C. Zonnevylle, P. J. van den Hoeck, R. A. van Santen and R. Hoffmann, Surf. Sci., 223, 233-257 (1989).
309.pdf
(1.42 MB)
308. Electronic Struvcture of a New Ternary Chalcogenide: NbNiTe5
J-F. Halet, R. Hoffmann, W. Tremel, E. W. Liimatta and J. A. Ibers, Chem. Mat. 1, 451-459 (1989)
307. The Electronic Structure of One-Dimensional Linear Halogen-Bridged Gold- Chains
C. Janiak and R. Hoffmann, Inorg. Chem., 28, 2743-2747 (1989).
307.pdf
(1.39 MB)
306. Bonding in the SrSnP and CaGaN Structures
D. Lj. Vuckovic and R. Hoffmann, Math/Chem/Comp, 1988, ed. A. Graovac, Elsevier, Amsterdam, 1989, 327-338.
305. Reactivity of Alkynes Toward M-η2-CS2 Metal Complexes. 3. The Couplin Products Obtainable with Bis-cyclopentadienyl Molybdenum Fragments and Their Relative Stability
F. Conan, J. Sala-Pala, J. Guerchais, R. Mercier, L. Toupet, J. Li, R. Hoffmann and C. Mealli, Organometallics, 8, 1929-1941 (1989).
305.pdf
(1.56 MB)
304. Reactivity of Alkynes Toward η-2-CS2 Metal Complexes. 2. A Theoretical Discussion on the Coupling Products Obtainable with Iron Fragments and Their Relative Stability
J. Li, R. Hoffmann and J. Silvestre, Organometallics, 8, 1921-1928 (1989)
304.pdf
(861.71 KB)
303. The Mode of Action of Carbonic Anhydrase
K. M. Merz, R. Hoffmann and M. J. S. Dewar, J. Amer. Chem. Soc., 111, 5636-5649 (1989).
303.pdf
(1.41 MB)
302. Citation Classic. A Simple Quantum Chemical Method
R. Hoffmann, Current Contents, 29(19), 20 (1989).
302 eH origins.pdf
(1.13 MB)
301. Conjugation in the 3-Connected Net: The AlB2 and ThSi2 Structures and Their Transition Metal Derivatives
C. Zheng and R. Hoffmann, Inorganic Chemistry, 28, 1074-1080 (1989).
301s_0.pdf
(678.91 KB)
300. Adsorption of Organo-Rhodium Species on Metal-Oxide Surfaces: Theoretical Aspects
J.-F. Halet and R. Hoffmann, J. Amer. Chem. Soc., 111, 3548-3559 (1989).
300.pdf
(1.23 MB)
299. The Role of Surface Bonding on Liquid-Crystal Alignment at Metal Surfaces
P. N. Sanda, D. B. Dove, H. L. Ong, S. A. Jansen and R. Hoffmann, Phys. Rev. A., 39(5), 2653-2658 (1989).
299.pdf
(284.12 KB)
298. The Richness of Structures Available to CpMS4MCp Complexes
W. Tremel, R. Hoffmann and E. D. Jemmis, Inorg. Chem., 28, 1213-1224 (1989).
298s_0.pdf
(1.24 MB)
297. Inorganic Rings, Intact and Cleaved, Between Two Metal Fragments
W. Tremel, R. Hoffmann and M. Kertesz, J. Amer. Chem. Soc., 111, 2030-2039 (1989).
297s_0.pdf
(1.07 MB)
296. How C-C Bonds Are Formed and How They Influence Structural Choices in Some Binary and Ternary Metal Carbides
J. Li and R. Hoffmann, Chem. Mat., 1, 83- 101 (1989).
296s_0.pdf
(1.71 MB)
295. Super-Dense Carbon, C8: Supercubane or Analogue of gamma-Si?
R. L. Johnston and R. Hoffmann, J. Amer. Chem. Soc., 111, 810-819 (1989).
295s_0.pdf
(1.04 MB)
294. Deformations in Mixed-Valence Cu(I)-Cu(II) Polymers
P. Sherwood and R. Hoffmann, Inorg. Chem., 28, 509-518 (1989).
294.pdf
(1.15 MB)
293. Metal-Metal Interactions, A Pairing Distortion, and S-Lined Channels in the M2Ta9S6 Structure
M. J. Calhorda and R. Hoffmann, Inorg. Chem., 27, 4679-4686 (1988).
293s_0.pdf
(844.48 KB)
292. Dimensionality, Metal-Metal and Metal-Oxygen Bonding in the NaNb3O6 Structure
M. J. Calhorda and R. Hoffmann, J. Amer. Chem. Soc., 110, 8376-8384 (1988).
292s_0.pdf
(1.09 MB)
291. Citation Classic. Bonding Capabilities of Transition Metal Carbonyl Fragments
M. Elian and R. Hoffmann, Current Contents, 28(44), 18 (1988).
citation classic elian.pdf
(270.95 KB)
290. Solids and Surfaces: A Chemist's View of Bonding in Extended Structures
R. Hoffmann, VCH, New York, 1988. Translated into Russian by A. L. Tchougreev, Mir, Moscow, 1990.
289. Trans-Edge-Sharing Molybdenum Octahedra: A Reciprocal Space Approach to Metal-Metal Bonding in Finite Chains
R. A. Wheeler and R. Hoffmann, J. Amer. Chem. Soc., 110, 7315-7325 (1988).
289.pdf
(1.21 MB)
288. A Reciprocal Space Approach to the Orbitals of Truncated Crystals
R. A. Wheeler, L. Piela and R. Hoffmann, J. Amer. Chem. Soc., 110, 7302-7315 (1988).
288.pdf
(1.78 MB)
287. The Adsorption of Benzotriazole on Copper and Cuprous Oxide
M. C. Zonnevylle and R. Hoffmann, J. Vac. Sci. Tech., A6(3), 885-886 (1988).
287.pdf
(449.24 KB)
286. Isomorphous Substitution in Phyllosilicates as an Electronegativity Perturbation: Its Effect on Bonding and Charge Distribution
W. F. Bleam and R. Hoffmann, Inorg. Chem., 27, 3180-3186 (1988).
286.pdf
(1.48 MB)
285. The Nature of the Bonding in Layered Compounds of Graphite with Transition Metals (in Russian)
W. Tremel, R. Hoffmann, M. E. Vol'pin and Yu. N. Novikov, Metalloorganicheskaya Khimia, 1, 1370 (1988).
285.pdf
(1.38 MB)
284. d10-d10 Interactions: Multinuclear Cu(I) Complexes
K. M. Merz, Jr. and R. Hoffmann, Inorg. Chem., 27, 2120-2127 (1988).
284s_0.pdf
(776.43 KB)
283. Thiophene Hydrodesulfurization on MoS2; Theoretical Aspects
M. C. Zonnevylle, R. Hoffmann, and S. Harris, Surf. Sci., 199, 320-360 (1988).
283.pdf
(2.97 MB)
282. Bond-Stretch Isomerism in Transition-Metal Complexes
Y. Jean, A. Lledos, J. K. Burdett and R. Hoffmann, J. Amer. Chem. Soc., 110, 4506-4516 (1988).
282s_0.pdf
(1.25 MB)
281. Electronic Mechanisms Associated with Bond-Stretch Isomerism in Transition-Metal Complexes
Y. Jean, A. Lledos, J. K. Burdett, and R. Hoffmann, J. Chem. Soc., Chem. Commun., 140-142 (1988).
281s_0.pdf
(2.87 MB)
280. A Chemical and Theoretical Way to Look at Bonding on Surfaces
R. Hoffmann, Rev. Mod. Phys., 60, 601-628 (1988).
280s_0.pdf
(16.06 MB)
279. Bonding and Coupling of C1 Fragments on Metal Surfaces
C. Zheng, Y. Apeloig and R. Hoffmann, J. Amer. Chem. Soc., 110, 749-774 (1988).
279s_0.pdf
(3.17 MB)
278. Surface Chemistry of Transition Metal Carbides: A Theoretical Analysis,
S. A. Jansen and R. Hoffmann, Surf. Sci., 197, 474-508 (1988).
278.pdf
(2.63 MB)
277. Ca3Al2Si2: an Inorganic Structure Analogous to but not Isoelectronic with Polyacene
J. Li and R. Hoffmann, J. Phys. Chem., 92, 887-893 (1988).
277s_0.pdf
(1.12 MB)
276. Orbital Interactions in Phyllosilicates: Perturbations of an Idealized Two-Dimensional Infinite Silicate Frame
W. Bleam and R. Hoffmann, Phys. Chem. Minerals, 15, 398-408 (1988).
276s_0.pdf
(16.43 MB)
275. Complementary Local and Extended Views of Bonding in the ThCr2Si2 and CaAl2Si2 Structures
C. Zheng and R. Hoffmann, J. Sol. State Chem., 72, 58-71 (1988).
275s_0.pdf
(23.91 MB)
274. YCoC, A Simple Organometallic Polymer in the Solid State with Strong Co-C Bonding
R. Hoffmann, J. Li, and R. A. Wheeler, J. Amer. Chem. Soc., 109, 6600-6602 (1987).
274s_0.pdf
(312.98 KB)
273. How Chemistry and Physics Meet in the Solid State
R. Hoffmann, Angew. Chem., 99, 871-906 (1987); Angew. Chem. Int. Ed. Engl., 26, 846-878 (1987).
272. 3,4-Connected Carbon Nets: Through-Space and Through Bond Interactions in the Solid State
K. M. Merz, Jr., R. Hoffmann, and A. T. Balaban, J. Amer. Chem. Soc., 109, 6742-6751 (1987).
272s_0.pdf
(945.86 KB)
271. Summary Abstract: A Theoretical Analysis of the Deactivation of Metal Surfaces Upon Carburization
S. A. Jansen and R. Hoffmann, J. Vac. Sci. Tech., A5(4), 637-640 (1987).
271.pdf
(617.93 KB)
270. Summary Abstract: Electronic Factors in Thiophene Adsorption and Hydrodesulfurization on MoS2 Surfaces, Theoretical Aspects, M. C. Zonnevylle, R. Hoffmann, J. Vac. Sci. Tech.,A5(4), 635-637 (1987).
Summary Abstract: Electronic Factors in Thiophene Adsorption and Hydrodesulfurization on MoS2 Surfaces, Theoretical Aspects, M. C. Zonnevylle, R. Hoffmann, J. Vac. Sci. Tech., A5(4), 635-637 (1987).
270.pdf
(508.04 KB)
269. Electronic and Steric Factors Determining the Asymmetric Epoxidation of Allylic Alcohols by Titanium-Tartrate Complexes (The Sharpless Epoxidation)
K. A. Jørgensen, R. A. Wheeler, and R. Hoffmann, J. Amer. Chem. Soc., 109, 3240-3246 (1987).
269.pdf
(759.42 KB)
268. Real and Hypothetical Examples of Bridging by η2-CS2 Ligands
M. C. Zonnevylle, R. Hoffmann, C. Mealli, and C. Bianchini, Gazzetta Chimica Italiana, 117, 117-124 (1987).
267. Coadsorbate Interactions: Sulfur and CO on Ni(100)
M. C. Zonnevylle and R. Hoffmann, Langmuir, 3, 452-459 (1987).
267.pdf
(1.05 MB)
266. Sigma Bond Cleavage in Coordinated Dioxygen: The Case of the µ-peroxo Complex, [(THF)3Cl2VIII-(022-)-VIIICl2(THF)3] and Vanadyl Formation in Solution
P. Chandrasekhar, R. A. Wheeler and R. Hoffmann, Inorg. Chim. Acta, 129, 51-59 (1987).
266.pdf
(701.31 KB)
265. Bonding in BaPdSn3 Type Structures
J. Li and R. Hoffmann, Z. Naturforsch., 41b, 1399-1415 (1987).
265s_0.pdf
(15.37 MB)
264. Tin Sulfide, (Te2)2I2 and Related Compounds: Symmetry Controlled Deformations in Solid State Materials
W. Tremel and R. Hoffmann, Inorg. Chem., 26, 118-127 (1987).
264.pdf
(1.01 MB)
263. Square Nets of Main Group Elements in Solid State Materials
W. Tremel and R. Hoffmann, J. Amer. Chem. Soc., 109, 124-140 (1987).
263s_0.pdf
(1.79 MB)
262. Bonding and Electronic Structure of Superconducting NbPS, D. A. Keszler and R. Hoffmann, J. Amer. Chem. Soc., 109, 118-124 (1987).
Bonding and Electronic Structure of Superconducting NbPS, D. A. Keszler and R. Hoffmann, J. Amer. Chem. Soc., 109, 118-124 (1987).
262s_0.pdf
(798.51 KB)
261. A New Magic Cluster Electron Count and Metal-Metal Multiple Bonding
R. A. Wheeler and R. Hoffmann, J. Amer. Chem. Soc., 108, 6605-6610 (1986).
261s_0.pdf
(736.02 KB)
260. A Novel Route to Metallacyclopropene (η2-vinyl) Complexes from Alkynes: Synthesis and X-ray Crystal Structure of Trans-[ReCl(=C(CH2Ph)CH2) Ph2PCH2CH2PPH2)2[BF4]
A. J. Pombeiro, D. L. Hughes, R. L. Richards, J. Silvestre and R. Hoffmann, J. Chem. Soc., Chem. Commun., 108, 1125-1127 (1986).
260.pdf
(330.08 KB)
259. The Stereoelectronic Causes of an Unusual Coordination Geometry of an Acetylene
M. J. Calhorda and R. Hoffmann, Organometallics, 5, 2181-2187 (1986).
259.pdf
(686.95 KB)
258. Transition Metal Nitrides, Organic Polyenes, and Phosphazenes: A Structural and Orbital Analogy
R. A. Wheeler, R. Hoffmann and J. Strähle, J. Amer. Chem. Soc., 108, 5381-5387 (1986).
258s_0.pdf
(762.06 KB)
257. The Band Structure of MoSi2
J. Silvestre and R. Hoffmann, Rev. Chim. Miner, 23, 299-312 (1986).
256. Double Carbonylation of Actinide Biscyclopentadienyl Complexes, Experimental and Theoretical Aspects
K. Tatsumi, A. Nakamura, P. Hofmann, R. Hoffmann, K. G. Moloy and T. J. Marks, J. Amer. Chem. Soc., 108, 4467-4476 (1986).
256.pdf
(1.11 MB)
255. Some Problems in the Oxidative Addition and Binding of an Ethylene to a Transition Metal Center
J. Silvestre, M. J. Calhorda, R. Hoffmann, P. O. Stoutland and R. G. Bergman, Organometallics, 5, 1841-1851 (1986).
255.pdf
(1.22 MB)
254. Reactivity of Alkynes toward η2-CX2 (X=S, Se) Metal Complexes. 1. The [2+2] Condensation of an Alkyne on a Metal Carbene: an Experimental and Theoretical Study. 2. Formation and X-Ray Structure of Unusual Doubly and Triply Condensed Cyclic Systems
C. Bianchini, C. Mealli, A. Meli, M. Sabat, J. Silvestre and R. Hoffmann, Organometallics, 5, 1733-1742 (1986).
254.pdf
(1.08 MB)
253. A Novel Electron Count and Metal-Metal Multiple Bonding in Trigonal Prismatic Clusters
R. A. Wheeler and R. Hoffmann, Angew. Chem., 98, 828 (1986).
252. Transitions between NiAs and MnP Type Phases; An Electronically Driven Distortion of Triangular (36) Nets
W. Tremel, R. Hoffmann and J. Silvestre, J. Amer. Chem. Soc., 108, 5174-5187 (1986).
252s_0.pdf
(1.5 MB)
251. H-H and C-H Activation Reactions at d0 Metal Centers
H. Rabaâ, J.-Y. Saillard and R. Hoffmann, J. Amer. Chem. Soc., 108, 4327-4333 (1986).
251s_0.pdf
(749.1 KB)
250. Adsorption of Methoxy on Cu(100)
D. Zeroka and R. Hoffmann, Langmuir, 2, 553-558 (1986).
250.pdf
(673.25 KB)
249. Symmetric vs. Asymmetric Linear M-X-M Linkages in Molecules, Polymers and Extended Networks
R. A. Wheeler, M.-H. Whangbo, T. Hughbanks, R. Hoffmann, J. K. Burdett and T. A. Albright, J. Amer. Chem. Soc., 108, 2222-2236 (1986).
249s_0.pdf
(1.6 MB)
248. Moving from Discrete Molecules to Extended Structures: A Chemical and Theoretical Approach to the Solid State
R. Hoffmann and C. Zheng, in Quantum Chemistry: The Challenge of Transition Metals and Coordination Chemistry, ed. A. Veillard, D. Reidel Publishing Co., 1986, 425-443.
247. A Theoretical and Chemical View of Surface Chemistry: Chemisorption and Reactions of Acetylene
J. Silvestre and R. Hoffmann, J. Vac. Sci. Technol. A, 4(3), 1336-1342 (1986).
247.pdf
(671.26 KB)
246. Donor Acceptor Layer Formation in the Solid: The CaBe2Ge2 Structure
C. Zheng and R. Hoffmann, J. Amer. Chem. Soc., 108, 3078-3088 (1986).
246s_0.pdf
(1.11 MB)
245. A Frontier Orbital Investigation of the Mechanism of Epoxidation of Alkenes Using [MoO(O2), M=Cr, Mo, W]
K. A. Jørgensen and R. Hoffmann, Acta Chem. Scand. B, 40, 411-419 (1986).
245.pdf
(923.3 KB)
244. Celebrating Djerassi
R. Hoffmann, J. Seeman, B. Shakhashiri, R. N. Zare, C&E News, Oct. 23, 2023, p. 2
2023-celebrating-djerassi_0.pdf
(49.69 KB)
244. The Close Ties Between Organometallic Chemistry, Surface Science and The Solid State
R. Hoffmann, Pure Appl. Chem., 58, 481-494 (1986).
244.pdf
(373.3 KB)
243. A Second-Order Jahn-Teller Distortion in the Solid: The Phase Transition in VSx.
J. Silvestre, W. Tremel and R. Hoffmann, J. Less. Comm. Met., 116, 113-128 (1986).
243.pdf
(994.57 KB)
243. Tabla en Construcción
R. Hoffmann, Mercurio Volante (supplement to Hipócrita lector, Junio 2023, p. 30, 31. In Spanish, adapted from “The Periodic Table” in Chemistry Imagined, Roald Hoffmann and Vivian Torrence, Smithsonian Institution Press.
242. NO Chemisorption on Ni(111): Coverage Effects, Site Preferences and Adsorption Geometry
S. Sung, R. Hoffmann and P. A. Thiel, J. Phys. Chem., 90, 1380-1388 (1986).
242.pdf
(1.01 MB)
242. The Best Numbers Are in Sight. But Understanding?
Roald Hoffmann and Jean-Paul Malrieu, in “Convergence: Artificial Intelligence and Quantum Computing”, ed. Greg Viggiano, Wiley, Hoboken 2023, pp. 129-141.
241. Site Preferences and Bond Length Differences in CaAl2Si2 Type Zintl Compounds
C. Zheng, R. Hoffmann, R. Nesper and H.-G. von Schnering, J. Amer. Chem. Soc., 108, 1876-1884 (1986).
241s_0.pdf
(811.31 KB)
241. Review of “In the Modern Age”
R. Hoffmann, review of Vol. 6 of the Bloomsbury Cultural History of Modern Science, ed. P. J. T. Morris, Bull. Hist. Chem. 47(3), 325-327 (2023)
Review of In the Modern Age.pdf
(101.45 KB)
240. Binding of Alkenes to the Ligands in OsO2X2(X=O, NR) and CpCo(NO)2. A Frontier Orbital Study of the Formation of Intermediates in the Transition Metal Catalyzed Synthesis of Diols, Amino Alcohols and Diamines
K. A. Jørgensen and R. Hoffmann, J. Amer. Chem. Soc., 108, 1867-1876 (1986).
240.pdf
(1.04 MB)
240. Words Matter: On the Debate over Free Speech, Inclusivity, and Academic Excellence
John M. Herbert, Martin Head-Gordon, Hrant P. Hratchian, Teresa Head-Gordon, Rommie E. Amaro, Alán Aspuru-Guzik, Roald Hoffmann, Carol A. Parish, Christina M. Payne. Troy Van Voorhis, J. Phys. Chem Lett., 2022, 13, 30, 7100-7104
words matter as published.pdf
(837.97 KB)
239. Science and Judaism
R. Hoffmann, in “Jews and Science,” ed. S. J. Ross and S. J. Gilman, Purdue University Press and Casden Institute for the Study of the Jewish Role in American Life, 2022, pp. 235-239.
science and judaism.pdf
(91.31 KB)
239. An Unusual Trimetallic Cluster and its Hypothetical Solid State Counterparts
M. C. Zonnevylle, J. Silvestre and R. Hoffmann, J. Amer. Chem. Soc., 108, 1509-1517 (1986).
239.pdf
(924.72 KB)
238. An Octet in Flushing Meadows
R. Hoffmann and D.L.V.K. Prasad, American Scientist, 109, 144-147 (2021).
238 An Octet in Flushing Meadows.pdf
(3.37 MB)
238. An Unusual Electron Count and Electron-Deficient Multi-Center Bonding in One Class of Intermetallics: The BaAl4, CaAl2Zn2, CeMg2Si2 and FCC Al Structures
C. Zheng and R. Hoffmann, Z. Naturforsch., 41b, 292-320 (1986).
238s_0.pdf
(25.02 MB)
237. “Druzhba, Kotoraya Dlilas’ 35 Let” (A Friendship Over 35 Years)
R. Hoffmann Koordinats. Khim., 47, 1-4 (2021). Russian Journal of Coordination Chemistry, 47(8), 583-586 (2021).
A Friendship as published.pdf
(1.42 MB)
237. The Mechanism of Generation of Hydrogen from Transition Metal Dithiolenes
S. Alvarez and R. Hoffmann, Anal. Soc. Real., 82, 52-56 (1986).
237.pdf
(2.41 MB)
236. Simulation vs Understanding: A Tension, in Quantum Chemistry and Beyond, C. Toward Consilience
R. Hoffmann and J.-P. Malrieu, Angewandte Chemie 59, 13694-13710 (2020).
236 anie.201910285 C.pdf
(2.6 MB)
236. Tetrahedral and Square Planar One-Dimensional Chains: The Interplay of Crystal Field and Band Width in MS2 Compounds
J. Silvestre and R. Hoffmann, Inorg. Chem., 24, 4108-4119 (1985).
236s_0.pdf
(1.31 MB)
235. Making and Breaking Bonds in the Solid State: The ThCr2Si2 Structure
C. Zheng and R. Hoffmann, J. Phys. Chem., 89, 4175-4181 (1985).
235s_0.pdf
(718.68 KB)
235. Simulation vs Understanding: A Tension, in Quantum Chemistry and Beyond, B. The March of Simulation, for Better or Worse
R. Hoffmann and J.-P. Malrieu, Angewandte Chemie, 59, 13156-13178 (2020).
235 anie.201910283 B.pdf
(1.26 MB)
234. Bonding in Some Nitrosylated Iron-Sulfur Clusters
S. Sung, C. Glidewell, A. R. Butler and R. Hoffmann, Inorg. Chem., 24, 3856-3859 (1985).
234.pdf
(470.42 KB)
234. Simulation vs Understanding: A Tension, in Quantum Chemistry and Beyond, A. Stage Setting
R. Hoffmann and J.-P. Malrieu, Angewandte Chemie, 59, 12590-125610 (2020).
234 anie.201902527 A.pdf
(3.12 MB)
233. C2Hn Fragments on Transition Metal Surfaces
J. Silvestre and R. Hoffmann, Langmuir, 1, 621-647 (1985).
233s_0.pdf
(2.97 MB)
233. Das Gleiche und das Nichtgleiche
Scheidewege, 2018, pp. 305-314.
233 Das Gleiche und das Nichtgleiche.pdf
(149.53 KB)
232. Hydrogen Migration in Transition Metal Alkyne and Related Complexes
J. Silvestre and R. Hoffmann, Helv. Chim. Acta., 68, 1461-1507 (1985).
232_1.pdf
(2.38 MB)
232. Creature and Creation
R. Hoffmann, Chemical & Engineering News, Jan. 1, 2018, p. 24-25.
232 Creature and Creation.pdf
(201.23 KB)
231. A Possible Mechanism of Formation of Polynuclear Molybdenum Clusters
J. Huang, J. Lu, Y. Jiang and R. Hoffmann, Scientia Sinica., 28, 1035-1041 (1985).
231. A recent stamp of Ukraine
Roald Hoffmann, Philatelica Chimica et Physica, 38 (4), 2017, 149-152
231a.pdf
(2.53 MB)
231. Fundamental and Applied Science, Academia and Industry, a Creative tension in Today’s Chemistry
(in Japanese), R. Hoffmann Kagakushi (The Journal of the Japanese Society for the History of Chemistry), 44(3), 150-157 (2017).
231 Fundamental and Applied Science.pdf
(613.93 KB)
230. Triangular Platinum and Nickel Clusters: The "Tinker-Toy" Construction of Chains with High Nuclearity
D. J. Underwood, R. Hoffmann, K. Tatsumi, A. Nakamura and Y. Yamamoto, J. Amer.Chem. Soc., 107, 5968-5980 (1985).
230s_0.pdf
(1.41 MB)
230. Reflections on Art in Science
Arte y Ciencia, Ciencia y Arte, Ed. Miguel A. Méndez-Rojas, Universidad de las Americas, San Andres Cholula, 2017, pp. 16-25.
229. Dimerization and Stacking in Transition Metal Bisdithiolenes and Tetrathiolates
S. Alvarez, R. Vicente and R. Hoffmann, J. Amer. Chem. Soc., 107, 6253-6277 (1985).
229s_0.pdf
(2.35 MB)
229. Foreword to Victor Fet, Poety storony: Stichorvorenia i poemi
Eretype, Portlaoise, Ireland, 2016.
229 Foreword to Victor Fet book.pdf
(84.56 KB)
228. Hypervalent Tellurium in One-dimensional Extended Structures Containing Te5n- Units
J. Bernstein and R. Hoffmann, Inorg. Chem., 24, 4100-4108 (1985).
228s_0.pdf
(984.91 KB)
228. A Lost Letter
Revue Roumaine de Chimie 61 (4-5), 239-242 (2016).
228 A Lost Letter.pdf
(240.37 KB)
227. CO Activation by Biscyclopentadienyl Complexes of Group IV Metal and Actinides: η2 - Acyl Complexes
K. Tatsumi, A. Nakamura, P. Hofmann, P. Stauffert and R. Hoffmann, J. Amer. Chem. Soc., 107, 4440-4451 (1985).
227.pdf
(1.33 MB)
227. Homo Citans and Carbon Allotropes: For an Ethics of Citation
Homo Citans and Carbon Allotropes: For an Ethics of Citation. R. Hoffmann, A.A. Kabanov, A.A. Golov, D.M. Proserpio. Angew. Chem. Int. Ed. 55 (2016), 10962-10976.
226. Preface
Preface to The Interview by Luisa Etxenique and Gustavo Ariel Schwartz, El Gallo de Oro, 2016.
226. η2 - Acyl Complexes of Group IV Metals and of Actinides
P. Hofmann, P. Stauffert, K. Tatsumi, A. Nakamura and R. Hoffmann, Organometal., 4, 404-406 (1985).
226.pdf
(406.14 KB)
225. Preface
Preface to Chemistry as a Game of Molecular Construction: The Bond-Click Way by Sason Shaik, Wiley, 2016.
225. Hydride Bridges Between LnCp2 Centers
J. V. Ortiz and R. Hoffmann, Inorg. Chem., 24, 2095-2104 (1985).
225.pdf
(926.87 KB)
224. Six and Five Vertex Organometallic Clusters
J.-F. Halet, R. Hoffmann and J.-Y. Saillard, Inorg. Chem., 24, 1695-1700 (1985).
224.pdf
(702.95 KB)
224. Preface to the Journal of Organic Chemistry’s special issue
Roald Hoffmann J. Org. Chem. 80 (2015), 11629.
Hoffmann JOC preface.pdf
(156.82 KB)
223. Tension in Chemistry and Its Conténts
Roald Hoffmann, Accountability in Research 22 (2015), 330-345.
Tension in Chemistry.pdf
(211.61 KB)
223. Binuclear and Polymeric Gold (I) Complexes
Y. Jiang, S. Alvarez and R. Hoffmann, Inorg. Chem., 24, 749-757 (1985).
223s_0.pdf
(922.02 KB)
222. The Many Guises of Aromaticity
Roald Hoffmann, American Scientist 103, 18-22 (2014).
PERSPECTIVE.pdf
(477.45 KB)
222. The Regiospecific Reaction of Nucleophiles with η5 - cyclohexadienyl) (η6 - arene) FeII cations: A Frontier Orbital controlled Route to (η4 - cyclohexadiene) (η6- benzene) Fe0 and Derivatives
D. Astruc, P. Michaus, A. M. Madonik, J.-Y. Saillard and R. Hoffmann, Nouv. J. Chim., 9, 41-50 (1985).
221. Foreword to "The Magic Force”
Roald Hoffmann Foreword to Catalysis, ed. P. Hofmann and L. Gade (Wiley-VCH, 2014), xix-xxvii.
Hoffmann Foreword_0.pdf
(2.98 MB)
221. N- vs. O-Linkage and σ vs. π Bonding in Transition Metal Complexes of N20 and NCO-
D. F. Tuan and R. Hoffmann, Inorg. Chem., 24, 871-876 (1985).
221.pdf
(668.37 KB)
220. The Tensions of Scientific Storytelling
Roald Hoffmann, American Scientist, 102, 250-253 (2014).
220. How Carbon Monoxide Bonds to Metal Surfaces
S. Sung and R. Hoffmann, J. Amer. Chem. Soc., 107, 578-584 (1985).
220s_0.pdf
(778.61 KB)
219. Lead Monoxide: Electronic Structure and Bonding
G. Trinquier and R. Hoffmann, J. Phys. Chem., 88, 6696-6711 (1984).
219s_0.pdf
(1.46 MB)
219. Little Interactions mean a lot
Roald Hoffmann, American Scientist, 102 (2014), 94-97.
Little Interactions Mean a Lot as published.pdf
(953.89 KB)
218. Trinuclear Clusters of Early Transition Metals: Jahn-Teller Distortions and Electronic Structure
Y. Jiang, A. Tang, R. Hoffmann, J. Huang and J. Lu, Organometallics, 4, 27-34 (1984).
218.pdf
(846.13 KB)
217. Evaluation of Moments and Their Application in Hückel MO Theory
Y. Jiang, A. Tang and R. Hoffmann, Theor. Chim. Acta., 66, 183-192 (1984).
217.pdf
(365.13 KB)
217. Maltese Reflections
Roald Hoffmann, Chemical and Engineering News, 91, 5, 2013.
216. The Graphite to Diamond Transformation
M. Kertesz and R. Hoffmann, J. Sol. State Chem., 54, 313-319 (1984).
216.pdf
(425.81 KB)
215. How Things End
Roald Hoffmann, in Letters to President Clinton: Biblical Lessons on Faith and Leadership, ed. Menachem Genack, Sterling Ethos, 2013, pp. 43-46.
How Things End.pdf
(77.61 KB)
215. The Reactivity of Transition Metal Cluster Carbides which have an Exposed Carbon Atom
S. D. Wijeyesekera, R. Hoffmann and C. N. Wilker, Organometallics, 3, 962-970 (1984).
215.pdf
(1.03 MB)
214. How a Simple Molecular Orbital Method Took Shape in the Lipscomb Group
Roald Hoffmann, in The Selected Papers of William N. Lipscomb, Jr.: A Legacy in Structure-Function Relations, ed. Jianpeng Ma, Imperial College Press, 2013, pp. 149-150.
214. Transition Metal Carbides: A Comparison of Bonding in Extended and Molecular Interstitials
S. D. Wijeyesekera and R. Hoffmann, Organometallics, 3, 949-961 (1984).
214s_0.pdf
(1.54 MB)
213. Street legàmi tra arte e chimica
Roald Hoffmann, Il Sole 24 Ore, 2 June 2013, Domenica Supplement, p. 29.
213. σ- vs. π;-Bonding in Organoactinides and Possibilities of CO Coordination to Actinides
K. Tatsumi and R. Hoffmann, Inorg. Chem., 23, 1633-1634 (1984).
213.pdf
(226.49 KB)
212. Alkyl Shifts Between Transition Metals and Coordinated Main Group Atoms
J. V. Ortiz, Z. Havlas and R. Hoffmann, Helv. Chim. Acta, 67, 1-17 (1984).
212.pdf
(660.25 KB)
212. The Joy of Chemistry
R. Hoffmann and B. Shakhashiri. Chemical and Engineering News 91(27) (July 8, 2013), p. 3.
211. Alkyne Scission on a Trimetallic Framework: Experimental Evidence and Theoretical Analysis
A. D. Clauss, J. R. Shapley, C. N. Wilker and R. Hoffmann, Organometallics, 3, 619-623 (1984).
211.pdf
(634.05 KB)
211. The Thermodynamic Sinks of This World
Roald Hoffmann, American Scientist, 101, 260-263 (2013).
210. Dinuclear Reductive Eliminations
G. Trinquier and R. Hoffmann, Organometallics, 3, 370-380 (1984).
210s_0.pdf
(1.02 MB)
210. Preface to Sierra, M. de la Torre and F.P. Cossio, More Dead Ends and Detours
Preface to Sierra, M. de la Torre and F.P. Cossio, More Dead Ends and Detours (Wiley-VCH).
217Other.pdf
(398.42 KB)
209. Octahedral vs. Trigonal Prismatic Coordination and Clustering in Transition Metal Dichalcogenides
M. Kertesz and R. Hoffmann, J. Amer. Chem. Soc., 106, 3453-3460 (1984).
209s_0.pdf
(808.23 KB)
209. A Personal Meditation on Creativity
R. Hoffmann, Foreword to Science Sifting, Rodney R. Dietert and Janice Dietert (World Scientific Press, 2013), pp. xi-xiv.
208. Foreword to "Aromaticity and Other Conjugation Effects"
R. Hoffmann, Foreword to Aromaticity and Other Conjugation Effects, ed. Rolf Gleiter and Gebhard Haberhauser, Wiley-VCH, Weinheim, 2012, pp. vii-viii.
208. Finite and Infinite Ribbons: From Platinum Alkyne Complexes to Extended Structures of the K2PtAs2 Type
D. J. Underwood, M. Nowak and R. Hoffmann, J. Amer. Chem. Soc., 106, 2837-2847 (1984).
208s_0.pdf
(1.13 MB)
207. Chemistry: Art, Craft, Labor and the Transformation of Matter
R. Hoffmann (in Russian), Vestnik Russiiskoi Akademii Nauk, 82(10), 917-920 (2012).
207. C-H and H-H Activation in Transition Metal Complexes and on Surfaces
J.-Y. Saillard and R. Hoffmann, J. Amer. Chem. Soc., 106, 2006-2026 (1984).
207s_0.pdf
(1.97 MB)
206. A Weed, a God
R. Hoffmann, in Light Years (Anos Luz), ed. Eulalia Bosch, Ministry of Education, Culture, and Sport, 2012, in English and Spanish, pp. 37-41.
206. A One-Dimensional Polymeric Ribbon Alternative to the Aggregation of d8 ML4 Fragments
R. Hoffmann, C. Minot and H. B. Gray, J. Amer. Chem. Soc., 106, 2001-2005 (1984).
206s_0.pdf
(464.79 KB)
205. Bonding to Hydrogen
R. Hoffmann, American Scientist 100, 374-378 (2012).
Bonding to Hydrogen as published.pdf
(629.7 KB)
205. A Molecular Orbital Analysis of the Bonding Capabilities of CS2 and CO2 Toward Transition Metal Fragments
C. Mealli, R. Hoffmann and A. Stockis, Inorg. Chem., 23, 56-65 (1984).
205.pdf
(1.18 MB)
204. Reflections on Art in Science
R. Hoffmann in Convergence: The Art Collection of the National Academy of Sciences, ed. by J.D. Talasek and Alana Quinn (National Academy of Sciences, 2012), 85-87.
204. Stabilizing Cyclic Ozone Through Transition Metal Complexation
S. Sung and R. Hoffmann, J. Mol. Sci., (Wuhan, China), 1, 1-12 (1983).
204.pdf
(487.24 KB)
203. Complexes With Interactions Between Metals and Aliphatic Groups of Boron Compounds. I. Synthesis and Reactivity of (η5-Cyclopentadienyl)-Cobalt (η5 - 1.3 Diborolene) Complexes. A Novel Type of Sandwich Compounds with a Penta-Coordinated Carbon Atom. Molec
Molecular Structure of (η5 - Cyclopentadienyl) cobalt 1.3.4.5-Tetraethyl-2-Methyl-2.3 Diborolene; Extended Hückel, and INDO MO studiesiborolene) Complexes. A Novel Type of Sandwich Compounds with a Penta-Coordinated , J. Edwin, M. C. Bohn, N. Chester, D. M. Hoffman, R. Hoffmann, H. Pritzkow, W. Siebert, K. Stumpf and H. Wadepohl, Organometallics, 2, 1666-1674 (1983).
203.pdf
(1.11 MB)
202. Higher Order Peierls Distortion of One-Dimensional Carbon Skeletons
M. Kertesz and R. Hoffmann, Sol. State Comm., 47, 97-102 (1983).
202s.pdf
(234.2 KB)
202. Long Live the Intermediate!
R. Hoffmann, American Scientist 100, 116-119 (2012).
long live the intermediate reprint.pdf
(540.47 KB)
201. Marcasite and Arsenopyrites: Structure, Bonding and Electrical Properties
S. D. Wijeyesekera and R. Hoffmann, Inorg. Chem., 22, 3287-3300 (1983).
201.pdf
(1.46 MB)
201. What, Another Nobel Prize in Chemistry to a Nonchemist?
R. Hoffmann, Angew. Chem. Int. Ed. Engl. 51, 1734-1735 (2012)
200. Change of C-C Bond Length in Layers of Graphite upon Charge Transfer
M. Kertesz, F. Vonderviszt and R. Hoffmann, in Intercalated Graphites, ed. M. S. Dresselhaus, Elsevier, 1983.
200. That's Interesting,
R. Hoffmann, American Scientist 99, 374-377 (2011).
That's Interesting_0.pdf
(822.83 KB)
199. Coupling Methylenes, Methylenes and Other π-Systems on One or Two Metal Centers
C. N. Wilker, R. Hoffmann and O. Eisenstein, Nouv. J. Chim., 7, 535-544 (1983).
199s_0.pdf
(13.52 MB)
199. Empathy is Global
R. Hoffmann, Preface to Chemistry as a Second Language: Chemical Education in a Globalized Society, eds. Charity Flener Lovitt and Paul Kelter (American Chemical Society, 2011), ix-x.
198. Metallacyclobutane Rearrangements
C. N. Wilker and R. Hoffmann, J. Amer. Chem. Soc., 105, 5285-5290 (1983).
198s_0.pdf
(645.72 KB)
198. One Shocked Chemist
R. Hoffmann, American Scientist 99, 116-119 (2011).
One Shocked Chemist.pdf
(576.71 KB)
197. A Hypothetical Metallic Allotrope of Carbon
R. Hoffmann, T. Hughbanks, M. Kertesz and P. H. Bird, J. Amer. Chem. Soc., 105, 4831-4832 (1983).
197.pdf
(292.28 KB)
197. For the 60th Birthday of Eiichi Nakamura
R. Hoffmann, Guest Editorial in Chem. Asian J. 6, 240-241 (2011).
197o.pdf
(278.62 KB)
196. Shining Light, Shedding Light
R. Hoffmann, Preface to B. Shakhashiri (ed.), Chemical Demonstrations: A Handbook for Teachers of Chemistry, Vol. 5 (The University of Wisconsin Press, 2011), pp. xiii-xix.
RH Essay with Header.pdf
(657.31 KB)
196. Chains of Trans-Edge Sharing Molybdenum Octahedra: Metal-Metal Bonding in Extended Systems
T. Hughbanks and R. Hoffmann, J. Amer. Chem. Soc., 105, 3528- 3537 (1983).
196s_0.pdf
(1.66 MB)
195. R. B. Woodward's Unfinished Symphony: Designing Organic Superconductors (1975-1979)
M. P. Cava, M. V. Lakshmikantham, R. Hoffmann, and R. M. Williams, Tetrahedron 67, 6771-6797 (2011).
1-s2.0-S0040402011006582-main.pdf
(11.34 MB)
195. Haptotropic Rearrangements of Polyene-MLn Complexes. II. Bicyclic Polyene- MCp, -M(CO)3 Systems
T. A. Albright, P. Hofmann, R. Hoffmann, C. P. Lillya and P. A. Dobosh, J. Amer. Chem. Soc., 105, 3396-3411 (1983).
195s_0.pdf
(1.78 MB)
194. Learning and Teaching Strategies
Roald Hoffmann and Saundra Y. McGuire, American Scientist, 98, 378-382 (2010).
Learning and Teaching Strategies_0.pdf
(496.57 KB)
194. Molybdenum Chalcogenides: Clusters, Chains and Extended Solids. The Approach to Bonding in Three Dimensions
T. Hughbanks and R. Hoffmann, J. Amer. Chem. Soc., 105, 1150-1162 (1983).
194.pdf
(1.33 MB)
193. A Theoretical Prescription for Reductive Coupling of CO and CNR Ligands
R. Hoffmann, C. N. Wilker, S. J. Lippard, J. L. Templeton and D. C. Brower, J. Amer. Chem. Soc., 105, 146-147 (1983).
193s_0.pdf
(277.07 KB)
192. Dimetallated Olefins
D. M. Hoffman and R. Hoffmann, Organometal., 1, 1299-1302 (1982).
192.pdf
(401.8 KB)
191. Honesty to the Singular Object
R. Hoffmann in Sprache, Lugen und Moral: Geschichtenerzahlen in Wissenschaft und Literatur, ed. Margery Arent Safir. Suhrkamp Insel: Frankfurt (2009), pp.84-110.
191. On the Existence of Binuclear π-Bonded Dinitrogen Complexes
K. I. Goldberg, D. M. Hoffman and R. Hoffmann, Inorg. Chem., 21, 3863-3868 (1982).
191.pdf
(604.91 KB)
190. Teaching and Learning Strategies That Work
Roald Hoffmann and Saundra Y. McGuire, Science, 325, 1203-1204 (Sept. 4, 2009).
190..pdf
(125.31 KB)
190. The (Mo3Se3-) Chain
T. Hughbanks and R. Hoffmann, Inorg. Chem., 21, 3578-3580 (1982).
190s_0.pdf
(369.29 KB)
189. Review of «Stereochemistry Workbook, 191 Problems and Solutions"
R. Hoffmann, Review of "Stereochemistry Workbook, 191 Problems and Solutions" by K.-H. Hellwich and C.D. Siebert, Bellstein Journal of Organic Chemistry, 5 (2009).
189.-review-of-stereochemistry-workbook.pdf
(129.69 KB)
189. Oxygen K near-edge fine structure: An electron-energy-loss investigation with comparisons to new theory for selected 3e transition-metal oxides
L. A. Grunes, R. D. Leapman, C. N. Wilker, R. Hoffmann and A. B. Kunz, Phys. Rev. B, 25, 7157-7173 (1982).
189.pdf
(1.92 MB)
188. Cost Cuts Should Come From Research, Not Just Education
R. Hoffmann, The Chronicle of Higher Education, Commentary, May 8, 2009.
cost-cuts-should-come-from-research.pdf
(38.72 KB)
188. Building Bridges Between Inorganic and Organic Chemistry
R. Hoffmann, in Les Prix Nobel 1981, Almqvist and Wiksell, Stockholm 1982. Reprinted in Angew. Chem., 94, 725-738 (1982); Angew. Chem. Int. Ed. Engl., 21, 711-724 (1982). Reprinted in Kemija u Industriji, 32, 603-618 (1983).
187. Electronic Origin of the Thermochromic Effect in 2, 2', 5, 5': Tetramethyldistibolyl
T. Hughbanks, R. Hoffmann, M.-H. Whangbo, K. A. Stewart, O. Eisenstein and E. Canadell, J. Amer. Chem. Soc., 104, 3876-3879 (1982).
187.pdf
(440.9 KB)
187. Foreword to "Strained Hydrocarbons"
R. Hoffmann in H. Dodziuk, ed., Strained Hydrocarbons, Wiley-VCH: Weinheim, 2009.
187..pdf
(17.53 KB)
186. The Transformations of Parallel and Perpendicular L2M(η-Acetylene)ML2 Complexes
D. M. Hoffman and R. Hoffmann, J. Chem. Soc., Dalton Trans., 1471-1482 (1982).
186.pdf
(1001.42 KB)
185. Perpendicular and Parallel Acetylene Complexes
D. M. Hoffman, R. Hoffmann and C. R. Fisel, J. Amer. Chem. Soc., 104, 3858-3875 (1982).
185s_0.pdf
(1.73 MB)
185. The Chemistry is Right, preface to "Liaisons â Histoires"
R. Hoffmann, preface to Liaisons a Histoires by Alain Sevin, Christine Dezarnaud Dandine, Piem, Ellipses, Paris 2008.
The Chemistry is Right.pdf
(67.03 KB)
184. Novel Acetylene Mo(II) Complexes, Mo(t-BuS)2(t-BuNC)2(RCCR') R, R' = H or Ph
M. Kamata, T. Yoshida, S. Otsuka, K. Hirotsu, T. Higuchi, M. Kida, K. Tatsumi and R. Hoffmann, Organometallics, 1, 227-230 (1982).
184.pdf
(460.11 KB)
184. The Tense Middle
R. Hoffmann in This I Believe II, ed. J. Allison, D. Gediman, Henry Holt, New York, 2008, pp. 112-114.
the tense middle as published.pdf
(128.74 KB)
183. Cyclobutadiene Complexes and the Role of Ligand Nonbonding or Peripheral Orbitals
S.-Y. Chu and R. Hoffmann, J. Phys. Chem., 86, 1289-1297 (1982).
183.pdf
(991.3 KB)
183. Predicting Molecules -- More Realism, Please
R. Hoffmann, P. von Rague Schleyer and H. F. Schaefer III, Angew. Chem. Int. Ed., 47, 7164-7167 (2008).
182. Structural and Theoretical Evidence for Participation of the Second Acetylene π Orbital in Transition Metal Alkyne Complexes
K. Tatsumi, R. Hoffmann and J. Templeton, Inorg. Chem., 21, 466-468 (1982).
182_0.pdf
(296.19 KB)
182. Why Think Up New Molecules?
Roald Hoffmann, American Scientist, 96, 372 (2008).
182.pdf
(416.74 KB)
181. Reductive Elimination
R. Hoffmann, in IUPAC. Frontiers of Chemistry, ed. K. J. Laidler, Pergamon Press, Oxford 1982, 247-263.
181s_0.pdf
(14.23 MB)
181. Learning from Molecules in Distress
R. Hoffmann and H. Hopf, Angewandte Chemie, 47, 4474-4481 (2008).
180. A Passion for Chemistry and Art
R. Hoffmann, L'Actualite Chimique Canadienne, 20-21 (March 2008).
180. On Coupling Carbenes and Carbynes, R. Hoffmann
R. Hoffmann, C. N. Wilker and O. Eisenstein, J. Amer. Chem. Soc., 104, 632-634 (1982).
180s_0.pdf
(389.93 KB)
179. On My Mind: Roald Hoffmann on Filling in Atoms.
Seed Magazine , p.3 (Jan./Feb. 2008).
179. Piano Stool Complexes of the CpML4 Type
P. Kubacek, R. Hoffmann and Z. Havlas, Organometallics, 1, 180-188 (1982).
179s_0.pdf
(992.53 KB)
178. Theoretical Studies of Some Metalloporphyrins of Unusual Structure
K. Tatsumi and R. Hoffmann, in Hemoglobin and Oxygen Binding, ed. Chien Ho, Elsevier North Holland Inc., 1982, p. 75.
177. Foreword to "Turning Points in Solid-State, Materials and Surface Science"
R. Hoffmann, Foreword to Turning Points in Solid-State, Materials and Surface Science, K.D.M. Harris and P.P. Edwards, eds., Cambridge, Royal Society of Chemistry, v-vi (2008).
177. A Reaction Path for Halogen Elimination from CX2Y2 and its Dynamical Implications
S. R. Cain, R. Hoffmann and E. R. Grant, J. Phys. Chem., 85, 4046-4051 (1981).
177.pdf
(634.66 KB)
176. Concluding Comments to The Artificial and the Natural: An Evolving Polarity
B. Bensaude-Vincent and W.R. Newman, eds., Cambridge, MIT Press, 313-314 (2007).
176. Quantenchemische Berechnungen von SiO2-Oberflächenclustern und ihren Adsorptions-und Oberflächenreaktionen
H. H. Dunken and R. Hoffmann, Z. Phys. Chem., 125, 207-238 (1981).
175. Foreword to "Dazzle Gradually" by Lynn Margulis and Dorian Sagan
Roald Hoffmann, Foreword to Dazzle Gradually by Lynn Margulis and Dorian Sagan, Chelsea Green, White River Junction, VT, pp. xi-xiii (2007).
175. Metalloporphyrins with Unusual Geometries. II. Slipped and Skewed Bimetallic Structures, Carbene and Oxo Complexes, Insertions into Metal-Porphyrin Bonds
K. Tatsumi and R. Hoffmann, Inorg. Chem., 20, 3771-3784 (1981).
175s_0.pdf
(1.54 MB)
174. A-Frames
D. M. Hoffman and R. Hoffmann, Inorg. Chem., 20, 3543-3555 (1981).
174s_0.pdf
(1.3 MB)
173. Extended Hückel Molecular Orbital Calculations on Dodecahedral Metalloboranes which do not Conform to the Polyhedral Skeletal Electron Pair Theory
D. N. Cox, D.M.P. Mingos and R. Hoffmann, J. Chem. Soc. Dalton Trans., 1788-1797 (1981).
173_0.pdf
(1.02 MB)
172. John Meurig Thomas
R. Hoffmann, preface to Turning Points in Solid-State, Materials and Surface Chemistry, by Kenneth Harris and Peter P. Edwards, Royal Society of Chemistry, London (2007).
172. A Highly Distorted Octahedral d4 Compound, Mo(t-BuS)2(t-BuNC)4
M. Kamata, K. Hirotsu, T. Higuchi, K. Tatsumi, R. Hoffmann and S. Otsuka, J. Amer. Chem. Soc., 103, 5772-5778 (1981).
172.pdf
(881.59 KB)
171. Some Geometrical and Electronic Features of the Intermediate Stages of Olefin Metathesis
O. Eisenstein, R. Hoffmann and A. R. Rossi, J. Amer. Chem. Soc., 103, 5582-5584 (1981).
171.pdf
(378.68 KB)
171. La belleza della chimica
R. Hoffmann, trans. S. Coyaud, Il Sole 24 Ore, Milano, Domenica Supplement, 7 Jan. 2007, p. 33.
171o.pdf
(30.23 KB)
170. Transition-Metal Complexed Olefins: How Their Reactivity Toward a Nucleophile Relates to Their Electronic Structure
O. Eisenstein and R. Hoffmann, J. Amer. Chem. Soc., 103, 4308-4320 (1981).
170s_0.pdf
(1.48 MB)
169. Metalloporphyrins with Unusual Geometries, I. Mono-, Di-, Tri-Atom, Bridged Porphyrin Dimers
K. Tatsumi and R. Hoffmann, J. Amer. Chem. Soc., 103, 3328-3341 (1981).
169s_0.pdf
(1.68 MB)
169. What Might Philosophy of Science Look Like If Chemists Built It?
Roald Hoffmann, Synthèse,155(3), 321-336 (2007).
169.pdf
(621.31 KB)
168. Deformations from Octahedral Geometry in d4 Transition Metal Complexes
P. Kubacek and R. Hoffmann, J. Amer. Chem. Soc., 103, 4320-4332 (1981).
168.pdf
(1.48 MB)
168. Mme. Lavoisier's Necessaire
R. Hoffmann, in Attachments by A.C. Dannenberg, Aava Books, Helsinki (2006).
167. Reductive Elimination of d8-Organotransitionmetal Complexes
K. Tatsumi, R. Hoffmann, A. Yamamoto and J. K. Stille, Bull. Chem. Soc., Japan, 54, 1857-1867 (1981).
167s_0.pdf
(1.55 MB)
167. Elettroni sopra Petra
R. Hoffmann, Atlantide, II(4), 9-10 (2006); reprinted as "Quei giovani: Il Premio Nobel Roald Hoffmann" in Cultura & Societa, 32-33 (12/23/2006).
166. Nickelacyclopentane Complexes, A Theoretical Investigation
R. J. McKinney, D. L. Thorn, R. Hoffmann and A. Stockis, J. Amer. Chem. Soc., 103, 2595-2603 (1981).
166.pdf
(854.64 KB)
166. Making Sense of the Image in the Nanoworld
R. Hoffmann, in Blow-up: Images from the Nanoworld, seen by Lucia Covi, Damiani editore, Bologna, 2006.
nanoworld_0.pdf
(1.25 MB)
165. Theoretical Organometallic Chemistry
R. Hoffmann, Science, 211, 995-1002 (1981); substantially the same material under the title Fragment Orbitals _ a Unifying Principle in Theoretical Organometallic Chemistry appears in Wiss. Zeitschr. Friedrich Schiller Univ. Jena, Math.- Nat. R.
165s.pdf
(1.27 MB)
165. Remembering, Returning, Forgiving
R. Hoffmann, International Herald Tribune, August 25, 2006.
remembering_returning_forgiving.pdf
(59.51 KB)
164. Cosi simili, cosi diverse 4. Ephedrine and Primo Levi
R. Hoffmann, script from Sylvie Coyaud's radio show, August 27, 2006.
cosi_simili_cosi_diverse_4.pdf
(16.11 KB)
164. Unusual M-C-H Angles, C-H Bond Activation, and α-Hydrogen Abstraction in Transition Metal Carbene Complexes
R. J. Goddard, R. Hoffmann and E. D. Jemmis, J. Amer. Chem. Soc., 102, 7667-7676 (1980).
164s_0.pdf
(1.03 MB)
163. Cosi simili, cosi diverse 3. Plain Vanilla
R. Hoffmann, script from Sylvie Coyaud's radio show, August 20, 2006.
cosi_simili_cosi_diverse_3.pdf
(15.82 KB)
163. Hypothetical Strain-Free Oligoradicals
O. Eisenstein, R. Hoffmann and A. T. Balaban, Proc. Natl. Acad. Sci. USA, 77, 5588-5592 (1980).
163_0.pdf
(662.03 KB)
162. Cosi simili, cosi diverse 2. Left foot in Right Shoe
R. Hoffmann, script from Sylvie Coyaud's radio show, August 13, 2006.
cosi_simili_cosi_diverse_2.pdf
(15.99 KB)
162. Activation of a Coordinated Olefin Toward Nucleophilic Attack
O. Eisenstein and R. Hoffmann, J. Amer. Chem. Soc., 102, 6148-6149 (1980).
162.pdf
(240.29 KB)
161. Cosi simili, cosi diverse 1. For a Few Atoms More: Testosterone and Doping
R. Hoffmann, script from Sylvie Coyaud's radio show, August 6, 2006.
cosi_simili_cosi_diverse_1.pdf
(71.97 KB)
161. Bent cis d0 MoO2]2+ vs Linear trans d0f0 UO2]2+ : A Significant Role for Nonvalence 6p orbitals in Uranyl
K. Tatsumi and R. Hoffmann, Inorg. Chem., 19, 2656-2658 (1980).
161s_0.pdf
(352.55 KB)
160. The Metaphor, Unchained
R. Hoffmann, American Scientist 94(5), 406-407 (2006).
metaphor_unchained.pdf
(74.14 KB)
160. Single Atom Bridged Porphyrin Dimers
K. Tatsumi, R. Hoffmann, and M.-H. Whangbo, J. Chem. Soc., Chem. Commun., 509-511 (1980).
160s_0.pdf
(2.99 MB)
159. Preface to "Liasons Chimiques: Structure et Reactivite" by Alain Sevin and Christine Dezarnaud-Dandine
Preface to Liasons Chimiques: Structure et Reactivite by Alain Sevin and Christine Dezarnaud-Dandine, R. Hoffmann, v-vi, Dunod, Paris (2006).
liasons_chimiques.pdf
(923.17 KB)
159. Bridged and Unbridged M2L10 Complexes
S. Shaik, R. Hoffmann, C. R. Fisel and R. H. Summerville, J. Amer. Chem. Soc., 102, 4555-4572 (1980).
159s_0.pdf
(2 MB)
158. Love Between the Atoms
R. Hoffmann, Sculpture, 25(3), 42-43 (2006).
love_between_the_atoms.pdf
(188.7 KB)
158. Metallocyclopentanes and Bis-Olefin Complexes
A. Stockis and R. Hoffmann, J. Amer. Chem. Soc., 102, 2952-2962 (1980).
158.pdf
(1.02 MB)
157. Foreword to "Alfred Neubauer's Bittere Nobelpreise"
Foreword to Alfred Neubauer's Bittere Nobelpreise, R. Hoffmann, Herstellung und Verlag: Books on Demand GmbH, 7-8, Norderstedt (2005).
neubauer.pdf
(300.16 KB)
157. The Electronic Structure of NbSe3
R. Hoffmann, S. Shaik, J. C. Scott, M.-H. Whangbo and M. J. Foshee, J. Solid State Chem., 34, 263-369 (1980).
157.pdf
(546.27 KB)
156. Old Gas, New Gas
R. Hoffmann, American Scientist 94(4), 16-18 (2005).
old_gas_new_gas.pdf
(1.08 MB)
156. A Class of Trinuclear Clusters with Carbonyl Bridging
A. R. Pinhas, T. A. Albright, P. Hofmann and R. Hoffmann, Helv. Chim. Acta, 63, 29-49 (1980).
156.pdf
(957.65 KB)
155. Cp2M2(CO)4 - Quadruply Bridging, Doubly Bridging, Semi-Bridging or Non- Bridging?
E. D. Jemmis, A. R. Pinhas and R. Hoffmann, J. Amer. Chem. Soc., 102, 2576-2585 (1980).
155.pdf
(1.16 MB)
155. "Roald Hoffmann"
Roald Hoffmann, in Mariana Cook, Faces of Science, Norton, New York (2005).
roald_hoffmann.pdf
(338.32 KB)
154. Cleaving CC Bonds in Cyclopropenium Ions and Cyclopropenones
E. D. Jemmis and R. Hoffmann, J. Amer. Chem. Soc., 102, 2570-2575 (1980).
154.pdf
(573.99 KB)
154. Materials: the Bridge Between Chemistry and Physics; preface to "Computational Chemistry of Solid State Materials"
Materials: The Bridge Between Chemistry and Physics, R. Hoffmann, preface to Computational Chemistry of Solid State Materials, R. Dronskowski, Wiley-VCH (2005).
153. Why Some Binuclear Complexes Bridge, While Others, Even Though They Might Have a Quadruple Bond Available to Them, Do Not
S. Shaik and R. Hoffmann, J. Amer. Chem. Soc., 102, 1194-1196 (1980).
153s_0.pdf
(375.16 KB)
153. Storied Theory
R. Hoffmann, American Scientist 93(4), 308-312 (2005).
storied_theory.pdf
(3 MB)
152. Band Structure of Face-Sharing Octahedral MX3n- Chains
M.-H. Whangbo, M. J. Foshee and R. Hoffmann, Inorg. Chem., 19, 1723-1728 (1980).
152s_0.pdf
(771.89 KB)
152. Science, Language and Poetry
R. Hoffmann, in Motivating Science: Science Communication from a Philosophical, Educational and Cultural Perspective, ed. Nigel Sanitt, London: Pantaneto Press, 71-75 (2005).
science_and_poetry.pdf
(2.6 MB)
151. M2L9 Complexes, R. H. Summerville and R. Hoffmann
R. H. Summerville and R. Hoffmann, J. Amer. Chem. Soc., 101, 3821-3831 (1979).
151s_0.pdf
(1.13 MB)
151. The Natural Philosopher Returns, Singing
R. Hoffmann, in Considering the Radiance, ed. D. Burak & R. Gilbert, New York: Norton & Co., 173 (2005).
natural_philosopher_returns,_singing.pdf
(4.87 MB)
150. Some Hydrido Bridged Transition Metal Dimers and Their Unsupported Analogues. Speculations on Pentuple Bonding and Pentuple Bridging
A. Dedieu, T. A. Albright and R. Hoffmann, J. Amer. Chem. Soc., 101, 3141-3151 (1979).
150s_0.pdf
(1.19 MB)
150. Science on the Cafe Scene
R. Hoffmann, Bulletin of the American Academy of Arts & Sciences 58(2), 39 (2005).
science_on_the_cafe_scene.pdf
(265.73 KB)
149. Delocalization in Metallocycles
D. L. Thorn and R. Hoffmann, Nouv. J. Chim., 3, 39 (1979).
149s_0.pdf
(9.97 MB)
149. Theoretical Chemistry
R. Hoffmann, in Foundations of Chemistry, 6, 11 (2004).
theoretical_chemistry_0.pdf
(0 bytes)
148. Dependence of Equilibrium Geometry and Rearrangement Modes on Electron Count in One Class of Trinuclear Complexes of Acetylene
B. E. R. Schilling and R. Hoffmann, Acta Chem. Scand., B33, 231-232 (1979).
148.pdf
(237.11 KB)
148. Shall We Change?
R. Hoffmann, in NCECA Journal 25, The Alchemy of Art and Science, 84 Indianapolis: NCECA (2004).
shall_we_change.pdf
(11.09 MB)
147. Conjugated One-and-Two Dimensional Polymers
M.-H. Whangbo, R. Hoffmann and R. B. Woodward, Proc. Roy. Soc., A366, 23 (1979).
147s_0.pdf
(17.76 MB)
147. Instruction
R. Hoffmann, in Do It, ed. Hans Ulrich Obrist, New York: e-flux, 150-151 (2004).
146. Polyene-ML2 and -ML4 Complexes, Conformational Preferences and Barriers to Rotation
T. A. Albright, R. Hoffmann, Y.-C Tse and T. D'Ottavio, J. Amer. Chem. Soc., 101, 3812-3821 (1979).
146s_0.pdf
(1.12 MB)
146. A Claim on the Development of the Frontier Orbital Explanation of Electrocyclic Reactions
R. Hoffmann, Angew. Chem. Intl. Ed. 43, 6586-6590 (2004).
145. Ethylene Complexes: Bonding, Rotational Barriers, and Conformational Preferences
T. A. Albright, R. Hoffmann, J. C. Thibeault and D. L. Thorn, J. Amer. Chem. Soc., 101, 3801 (1979).
145s_0.pdf
(1.42 MB)
145. Will We Stop at Nothing?
R. Hoffmann, American Scientist 93, 18-21 (2004).
will_we_stop_at_nothing.pdf
(351.52 KB)
144. M3L9(Ligand) Complexes
B. E. R. Schilling and R. Hoffmann, J. Amer. Chem. Soc., 101, 3456-3467 (1979).
144s_0.pdf
(1.25 MB)
144. Science and Crafts
R. Hoffmann, in The Nature of Craft and the Penland Experience, ed. Jean McLaughlin, New York: Lark Books, 58-64 (2004).
science_and_crafts.pdf
(188.29 KB)
143. Ring Puckering and Metal-Metal Separations in One Class of Dibridged Binuclear Complexes
A. R. Pinhas and R. Hoffmann, Inorg. Chem., 18, 654-658 (1979).
143.pdf
(614.2 KB)
143. Meissen Chymistry
R. Hoffmann, American Scientist 92, 312-315 (2004); reprinted in The Science and Technology File, 10, Japan (2004).
meissen_chymistry.pdf
(4.46 MB)
142. The Effect of Ligand Asymmetry on the Structure and Reactivity of CpMLL'-(allyl) and -(ethylene) Complexes, B. E. R. Schilling, R. Hoffmann and J. W. Faller, J. Amer. Chem. Soc., 101, 592 (1979).
The Effect of Ligand Asymmetry on the Structure and Reactivity of CpMLL'-(allyl) and -(ethylene) Complexes, B. E. R. Schilling, R. Hoffmann and J. W. Faller, J. Amer. Chem. Soc., 101, 592-598 (1979).
142.pdf
(839.85 KB)
142. Comment on "Suet Pudding, Spotted Dick"
R. Hoffmann, Epoch 52(3), 349 (2004).
suet_pudding_spotted_dick.pdf
(548.75 KB)
141. CpM(CO)2(Ligand) Complexes
B. E. R. Schilling, R. Hoffmann and D. L. Lichtenberger, J. Amer. Chem. Soc., 101, 585 (1979).
141s_0.pdf
(846.64 KB)
141. Science to a Samba Beat
R. Hoffmann, Nature 428, 21 (March 2004).
science_to_a_samba_beat.pdf
(629.82 KB)
140. Bis [µ-methyl-1,3-dimethyl-h3-allyl-nickel] Struktur und Bindungsverhältnisse eines Alkyl-verbrückten Ni-Ni-Systems
C. Krüger, J. C. Sekutowski, H. Berke and R. Hoffmann, Z. Naturf., 33B, 1110 (1978).
139. Triple-Bonded Ethane-Like M2L6 Transition Metal Complexes Should be Eclipsed
T. A. Albright and R. Hoffmann, J. Amer. Chem. Soc., 100, 7736-7738 (1978).
139s_0.pdf
(380.45 KB)
139. In Praise of Synthetic Beauty
R. Hoffmann, in Dialogos Disciplinares: As ciencias e as artes na viragem de milenio, ed. A. Pinheiro da Sousa and T. de A. Malafaia, Lisbon: IST Press (2003).
138. Organometallic Migration Reactions
H. Berke and R. Hoffmann, J. Amer. Chem. Soc., 100, 7224 (1978). The same material is reported in: Organometallic 1, 2 Shift Type Migration Reactions, in Quantum Theory of Chemical Reactions, Vol. II, ed. R. Daudel, A. Pullman, A. Salem and A. Veillard, D. Reidel, 1980.
138s_0.pdf
(1.31 MB)
138. La sconfitta del flogisto
Carl Djerassi & Roald Hoffmann, Il Sole-24 Ore, 34 (Oct. 3, 2003).
137. The Possibility of a Non-Centered Structure for (CO)9Co3CCR2+
B. E. R. Schilling and R. Hoffmann, J. Amer. Chem. Soc., 100, 6274 (1978).
137.pdf
(125.63 KB)
137. Thoughts on Aesthetics and Visualization In Chemistry
R. Hoffmann, Hyle 9(1), 7-10 (2003).
136. Eight Coordination
J. K. Burdett, R. Hoffmann and R. C. Fay, Inorg. Chem., 17, 2553 (1978).
136s_0.pdf
(1.94 MB)
135. Cu(I)-Cu(I) Interactions. Bonding Relationships in d10-d10 Systems
P. K. Mehrotra and R. Hoffmann, Inorg. Chem., 17, 2187-2189 (1978).
copper_0.pdf
(385.92 KB)
135. Comment on writing 'Why Buy That Theory?"
R. Hoffmann, in The Best American Science Writing 2003, Oliver Sacks, ed., Harper Collins, New York, 222-227 (2003).
comment.pdf
(651.63 KB)
134. The Band Structure of the Tetracyanoplatinate Chain
M.-H. Whangbo and P. Hoffmann, J. Amer. Chem. Soc., 100, 6093 (1978).
134s_0.pdf
(646.47 KB)
134. "Preface" to "Une Introduction a la Structure Orbitalaire des Complexes des Metaux de Transition"
Preface to Une Introduction a la Structure Orbitalaire des Complexes des Metaux de Transition by Yves Jean, Editions de l'Ecole Polytechnique, 3-4 (2003).
preface_jean.pdf
(1020.85 KB)
133. Electronic Structure of M4(CO)12Hn and M4Cp4Hn Complexes
R. Hoffmann, B. E. R. Schilling, R. Bau, H. D. Kaesz and D. M. P. Mingos, J. Amer. Chem. Soc., 100, 6088 (1978).
133.pdf
(679.43 KB)
133. Unsettling Knowledge: a Poetry/Science Trialogue
R. Hoffmann, in J. Monroe, A. Fulton & R. Hoffmann, Language and Learning Across the Disciplines 6(2), 154-180 (2003).
unsettling_knowledge.pdf
(4.8 MB)
132. Counter-Intuitive Orbital Mixing
M.-H Whangbo and R. Hoffmann, J. Chem. Phys., 68, 5498 (1978).
132s_0.pdf
(203.48 KB)
131. Counter-Intuitive Orbital Mixing in Semi-Empirical and Ab Initio Molecular Orbital Calculations
J. H. Ammeter, H.-B. Bürgi, J. C. Thibeault and R. Hoffmann, J. Amer. Chem. Soc., 100, 3686-3692 (1978).
131s_0.pdf
(783.55 KB)
131. Why Buy That Theory?
R. Hoffmann, American Scientist, 91, 9-11 (2003); Arts & Sciences Newsletter 24(2), 3-6 (2003); The Best American Science Writing 2003, Oliver Sacks, ed., Harper Collins, New York, 222-227 (2003); trans. into Portugese in Quemica: Boletim de Sociedade Portuguesa de Quemica, 89, April-June 2003, 63-65.
why_buy_that_theory.pdf
(2.66 MB)
130. Tempered Orbital Energies in SCF MO Calculations and their Relation to the Ordinate in Mulliken-Walsh Correlation Diagrams and Extended Hückel Orbital Energies
P. K. Mehrotra and R. Hoffmann, Theor. Chim. Acta, 48, 301 (1978).
tempered.pdf
(1.07 MB)
130. An American Student of A. S. Davydov in 1960-61
R. Hoffmann; in Vospominania ob Aleksandere Sergeeviche Davydove, ed. V.M. Loktev, Institut Tereticheskoi Fisiki im. N.N. Bogolyubova, Kiev, 265-266 (2002).
an_american_student_of_a._s._davydov.pdf
(227.01 KB)
129. Cycloheptatriene and Fulvene Cr(CO)3 Complexes
T. A. Albright, R. Hoffmann and P. Hofmann, Chem. Ber., 111, 1591 (1978).
128. Conformational Preferences of Substituted Cyclopentadienyl Complexes
T. A. Albright and R. Hoffmann, Chem. Ber., 111, 1578 (1978).
127. The Olefin Insertion Reaction
D. L. Thorn and R. Hoffmann, J. Amer. Chem. Soc., 100, 2079-2090 (1978).
127s_0.pdf
(1.28 MB)
127. Avant-propos to special issue on La Chimie Nouvelle
R. Hoffmann, La Jaune et La Rouge, Paris, pp. 8-10 (Feb, 2002).
chimie_nouvelle.pdf
(7.93 MB)
126. Pt(0)-Pt(0) Dimers. Bonding Relationships in a d10-d10 System
A. Dedieu and R. Hoffmann, J. Amer. Chem. Soc., 100, 2074-2079 (1978).
126s_0.pdf
(628.84 KB)
126. On Poetry and the Language of Science
R. Hoffmann, Daedalus, 137-140 (Spring 2002); reprinted in Poiema, Kolkata, India (2004).
125. Theoretical Aspects of the Coordination of Molecules to Transition Metal Centers
Theoretical Aspects of the Coordination of Molecules to Transition Metal Centers
125.pdf
(215.56 KB)
125. Mme. Lavoisier
R. Hoffmann, American Scientist 90, 22-24 (2002); reprinted in The Nucleus 80(10) 35-38 (2002).
mme_lavoisier.pdf
(3.23 MB)
124. Transits Across a Cyclopentadienyl. Organic and Organometallic Haptotropic Shifts
Nguyen Trong Anh, M. Elian and R. Hoffmann, J. Amer. Chem. Soc., 100, 110-116 (1978).
124s_0.pdf
(824.51 KB)
123. "Foreword" to "Imaging a Career in Science: the Iconography of Antoine Laurent Lavoisier" by Marco Beretta
R. Hoffmann, Foreword to Imaging a Career in Science: the Iconography of Antoine Laurent Lavoisier by Marco Beretta, Watson Publishing International, Canton, MA (2001).
122. Diazenido, Dinitrogen and Related Complexes
D. L. DuBois and R. Hoffmann, Nov. J. Chim., 1, 479 (1977).
122s140.pdf
(11.42 MB)
121. The Stability of Organo-Gold Compounds. Hydrolytic, Thermal and Oxidative Cleavages of Dimethylaurate (I) and Tetramethylaurate (III)
S. Komiya, T. A. Albright, R. Hoffmann and J. K. Kochi, J. Amer. Chem. Soc., 99, 8440 (1977).
121.pdf
(929.68 KB)
121. Coping with Fritz Haber's Somber Literary Shadow
R. Hoffmann & P. Laszlo, Angew. Chem. 40(24), 4599-4604 (2001).
120. Conformational Preferences and Rotational Barriers in Polyene-ML3 Transition Metal Complexes
T. A. Albright, P. Hofmann and R. Hoffmann, J. Amer. Chem. Soc., 99, 7546 (1977).
120s_0.pdf
(1.46 MB)
120. Who Put Wisdom in the Hidden Parts?
R. Hoffmann, The Bookpress, 11(3), 7 (April 2001).
who_put_wisdom_in_the_hidden_parts.pdf
(1.51 MB)
119. The Structure of a Molecular Nitrogen Complex (in Russian)
R. Hoffmann, D. L. Thorn and A. E. Shilov, Koordinats. Khim., 3, 1260 (1977).
119s.pdf
(2.7 MB)
119. Why History of Chemistry?
R. Hoffmann, foreword to Chemical Sciences in the 20th Century: Bridging Boundaries (Weinheim: Wiley-VCH, 2001); reprinted as \"Clio's Art in the Laboratory\" in Chemical Heritage, 20(3), 3-4 (2002).
why_history_of_chemistry.pdf
(1.98 MB)
118. The Structure of and Bonding in Bis-(1, 3-Dicyclohexylphosphino-Propane) Di-Nickelhydride - A Three-Center Hydrogen-Bridged Ni-Ni System
B. L. Barnett, C. Krüger, Y.-H. Tsay, R. H. Summerville and R. Hoffmann, Chem. Ber., 110, 3900 (1977).
118. Not a Library
R. Hoffmann, Angew. Chem. 40(18), 3337-3340 (2001).
117. Nitroenamines
S. Rajappa, R. Sreenivasan, B. G. Advani, R. H. Summerville and R. Hoffmann, Ind. J. Chem., 15B, 297 (1977).
117. Thermophiles in Kamchatka
R. Hoffmann, American Scientist 89, 20-23 (2001).
thermophiles_in_kamchatka.pdf
(3.51 MB)
116. Seven Coordination. A Molecular Orbital Exploration of Structure, Stereochemistry, and Reaction Dynamics
R. Hoffmann, B. F. Beier, E. L. Muetterties and A. R. Rossi, Inorg. Chem., 16, 511 (1977).
116s_0.pdf
(1.58 MB)
116. "Preface" to Patricia Linn, "Crear y criar con ciencio"
R. Hoffmann, Preface to Patricia Linn, Crear y criar con ciencio, Montevideo: A Monteverde (2000).
preface_crear_y_criar_con_ciencio.pdf
(1.27 MB)
115. A Qualitative Discussion of Alternative Coordination Modes of Diatomic Ligands in Transition Metal Complexes
R. Hoffmann, M. M.-L. Chen and D. L. Thorn, Inorg. Chem., 16, 503 (1977).
115s_0.pdf
(17.19 MB)
115. Challenge and Play, the C, H World, a review of Henning Hopf, Classics in Hydrocarbon Chemistry
R. Hoffmann, a review of Henning Hopf, Classics in Hydrocarbon Chemistry, in Nachrichten aus der Chemie 48 (2000).
114. Reductive Elimination and Isomerization of Organo-gold Complexes. Theoretical Studies of Trialkylgold Species as Reactive Intermediates
S. Komiya, T. A. Albright, R. Hoffmann and J. Kochi, J. Amer. Chem. Soc., 98, 7255 (1976).
114.pdf
(1.21 MB)
114. Protean
R. Hoffmann and Pierre Laszlo, Angew. Chem. Int. Ed., 40(6), 1033-1036 (2001).
113. Tetrahedral and Other M2L6 Transition Metal Dimers
R. H. Summerville and R. Hoffmann, J. Amer. Chem. Soc., 98, 7240 (1976).
113s_0.pdf
(1.7 MB)
113. Benjamin Lee Whorf: once a Chemist...
R. Hoffmann and Pierre Laszlo, Interdisciplinary Science Reviews, 26(1), 15-19 (2001); in French in Alliage 47, 59-65 (2001).
benjamin_lee_whorf.pdf
(681.33 KB)
112. A Comparative Bonding Study of Conical Fragments
M. Elian, M. M.-L. Chen, D. M. P. Mingos and R. Hoffmann, Inorg. Chem., 15, 1148 (1976).
112s_0.pdf
(13.84 MB)
112. At First Sight
Roald Hoffmann, Crystal Growth and Design, 1(1), 3 (2000).
at_first_sight_0.pdf
(522.84 KB)
111. Triple-Decker Sandwiches
J. W. Lauher, M. Elian, R. H. Summerville and R. Hoffmann, J. Amer. Chem. Soc., 98, 3219 (1976).
111s_0.pdf
(648.96 KB)
111. How Symbolic and Iconic Languages Bridge the Two Worlds of the Chemist: A Case Study from Contemporary Bioorganic Chemistry
E.R. Grosholz and R. Hoffmann, in Nalini Bhushan and Stuart Rosenfeld, Of Minds and Molecules: New Philosophical Perspectives on Chemistry, Oxford University Press (2000); also in French in Les Langages Scientifiques, ed. F. Letoublon, Editions ARASSH, Grenoble.
symbolic_and_iconic_languages.pdf
(1.97 MB)
110. The Language of Science, the Language of Poetry
R. Hoffmann, Future, The Aventis Magazine 2, 76-81 (2000).
110. Bicapped Tetrahedral, Trigonal Prismatic and Octahedral Alternatives in Main and Transition Group Six-Coordination
R. Hoffmann, J. M. Howell and A. R. Rossi, J. Amer. Chem. Soc., 98, 2484 (1976).
110s_0.pdf
(1.07 MB)
109. Writing (and Drawing) Chemistry
R. Hoffmann, Writing and Revising the Disciplines, ed. Jonathan Monroe, Cornell University Press, 29-53 (2002).
writing_and_drawing_chemistry.pdf
(4.27 MB)
109. Structure and Chemistry of Bis(Cyclopentadienyl)MLn Complexes
J. W. Lauher and R. Hoffmann, J. Amer. Chem. Soc., 98, 1729 (1976).
109s_0.pdf
(1.45 MB)
108. Sulfuranes: Theoretical Aspects of Bonding, Substituent Site Preferences, and Geometrical Distortions
M. M.-L. Chen and R. Hoffmann, J. Amer. Chem. Soc., 98, 1647 (1976).
108.pdf
(784.63 KB)
108. Science and Poetry
R. Hoffmann, in Connecting Creations: Science-Technology-Literature-Arts, ed. M.A. Safir, Centro Galego de Arte Contemporanea (CGAC), Xunta de Galicia, Santiago de Compostela, Spain, (2000); also in Spanish, \"Ciencia y Poesa\" and \"Ingeniera de la Servilleta\" in Conectando creaciones: Ciencia-Tecnologia-Literatura-Arte, Xunta de Galicia, Santiago de Compostela, Spain (2000).
science_and_poetry_0.pdf
(2.6 MB)
107. Science-in-Theater
R. Hoffmann & C. Djerassi, in Connecting Creations: Science-Technology-Literature-Arts, ed. M.A. Safir, Centro Galego de Arte Contemporanea (CGAC), Xunta de Galicia, Santiago de Compostela, Spain (2000).
science_theater.pdf
(6.55 MB)
107. The Electronic Origin of Geometrical Deformations in Cyclohexadienyl and Cyclobutenyl Transition Metal Complexes
R. Hoffmann and P. Hofmann, J. Amer. Chem. Soc., 98, 598 (1976).
107.pdf
(819.29 KB)
106. Orbital Interactions in Metal Dimer Complexes
P. J. Hay, J. C. Thibeault and R. Hoffmann, J. Amer. Chem. Soc., 97, 4884 (1975).
106s_0.pdf
(1.72 MB)
105. Augmented Silicon-Carbon Bond Strengths via d-σ Hyperconjugation
P. D. Mollere and R. Hoffmann, J. Amer. Chem. Soc., 97, 3680 (1975).
105.pdf
(351.37 KB)
105. Chimica dell'imaginazione
R. Hoffmann, Il Sole-24 ore (in Italian) 110, 33 (April 23, 2000).
105o.pdf
(28.27 KB)
104. The Bonding Capabilities of Transition Metal Carbonyl Fragments
M. Elian and R. Hoffmann, Inorg. Chem., 14, 1058 (1975).
104s_0.pdf
(2.47 MB)
104. How Nice to be An Outsider
R. Hoffmann, Canadian Review of Comparative Literature 26 (3 & 4) (1999), pp. 163-169.
104.pdf
(4 MB)
103. Transition Metal Pentacoordination, A. R. Rossi and R. Hoffmann
A. R. Rossi and R. Hoffmann, Inorg. Chem.,14, 365 (1975).
103s_0.pdf
(17.79 MB)
103. A Mission Statement for the Nobel Museum
R. Hoffmann, Nobelmuseet Newsletter 4 (1999).
nobel_museum.pdf
(576.35 KB)
102. Molecular Orbital Studies of Dissociative Chemisorption of First Period Diatomic Molecules and Ethylene on (100) W and Ni Surfaces
A. B. Anderson and R. Hoffmann, J. Chem. Phys., 61, 4545 (1974).
102.pdf
(1.28 MB)
102. Ferrocene: Ironclad History or Rashomon Tale?
P. Laszlo and R. Hoffmann, Angewandte Chemie 39(1), 123-124 (2000).
101. Pentacoordinate Nitrosyls
R. Hoffmann, M. M.-L. Chen, M. Elian, A. R. Rossi and D. M. P. Mingos, Inorg. Chem., 13, 2666 (1974).
101s_0.pdf
(1.24 MB)
101. Exquisite Control
R. Hoffmann, American Scientist 88, 14 (2000).
exquisite_control.pdf
(978.94 KB)
100. The Geometry of Transition-Metal Complexes with Ethylene or Allyl Groups as the only Ligands
N. Rösch and R. Hoffmann, Inorg. Chem., 13, 2656 (1974).
100s_0.pdf
(18.95 MB)
100. Pulse, Pump and Probe
R. Hoffmann, American Scientist, 87, 308 (1999).
pulse_pump_and_probe.pdf
(1.03 MB)
99. Theory in Chemistry
R. Hoffmann, Chem. & Eng. News, 72(30), 32 (July 29, 1974).
99s_0.pdf
(5.44 MB)
99. The Essence of Nature in the Art of Charles Seliger
R. Hoffmann in Charles Seliger, the Nascent Image, Exhibition Catalogue, Michael Rosenfeld Gallery, New York (1999).
seliger.pdf
(3.91 MB)
98. The Perturbation of Molecules by Static Fields, Orbital Overlap and Charge Transfer
H. Fujimoto and R. Hoffmann, J. Phys. Chem., 78, 1874 (1974).
98.pdf
(842.34 KB)
98. A Really Moving Story
R. Hoffmann, American Scientist, 87(1), 21-23 (1999).
a_really_moving_story.pdf
(757.64 KB)
97. A Molecular Orbital Study of the Addition of Singlet Methylene to Butadiene
H. Fujimoto and R. Hoffmann, J. Phys. Chem., 78, 1167 (1974).
97.pdf
(922.83 KB)
97. Serendipity, the Grace of Discovery
R. Hoffmann, Drug Innovation and Approval 1, 28-31 (Dec. 1998).
96. Description of Diatomic Molecules Using One Electron Configuration Energies with Two-Body Interactions
A. B. Anderson and R. Hoffmann, J. Chem. Phys., 60, 4271 (1974).
96.pdf
(410.41 KB)
96. The Say of Things
R. Hoffmann and P. Laszlo, Social Research, 65 (3), 653-693 (Fall 1998); excerpts translated into Italian by Sylvie Coyaud as \"Per una Nova Chimica delle Idee,\" Il Sole 24 Ore, 29 Nov. 1998, p.32; (in German, translated by Christiana Goldmann) in Von Verstândnis der Natur, ed. Matthias Kross, Berlin: Akademie Verlag (2001).
the_say_of_things.pdf
(5.15 MB)
95. Towards a Detailed Orbital Theory of Substituent Effects: Charge Transfer, Polarization and the Methyl Group
L. Libit and R. Hoffmann, J. Amer. Chem. Soc., 96, 1370 (1974).
95s_0.pdf
(1.49 MB)
95. Doebereiner's Lighter
R. Hoffmann American Scientist, 86(4), 326-329 (1998).
dobereiners_lighter.pdf
(1.04 MB)
94. Why a Cyclopropyl Group is Good at Stabilizing a Cation but Poor at Transmitting Substituent Effects
C. F. Wilcox, L. M. Loew and R. Hoffmann, J. Amer. Chem. Soc., 95, 8192 (1973).
94.pdf
(285.62 KB)
94. Movement of the People
R. Hoffmann, Science, 280, 386-387 (Apr. 17, 1998).
movement_of_the_people.pdf
(680.29 KB)
93. Theoretical Aspects of the Bonding in Some Three-Membered Rings Containing Sulfur
R. Hoffmann, H. Fujimoto, J. R. Swenson and C.-C. Wan, J. Amer. Chem. Soc., 95, 7644 (1973).
93.pdf
(846.42 KB)
92. Orbital Noninteraction in Bridged Cyclohexanes
R. Hoffmann, P. D. Mollere and E. Heilbronner, J. Amer. Chem. Soc., 95, 4860 (1973).
92.pdf
(349.87 KB)
91. Superjacent Orbital Control. An Interpretation of the Anomeric Effect
S. David, O. Eisenstein, W. J. Hehre, L. Salem, R. Hoffmann, P. D. Mollere and E. Heilbronner, J. Amer. Chem. Soc., 95, 3806 (1973).
91.pdf
(280.07 KB)
91. Crystal-Cloudy, Crystal-Clear
R. Hoffmann, American Scientist, 86(1), 15-18 (1998).
crystal_cloudy_crystal_clear.pdf
(767.38 KB)
90. Orbital Interaction in Amino-ketones
C. C. Levin, R. Hoffmann, W. J. Hehre and J. Hudec, J. Chem. Soc., Perkin Transactions, 2, 210 (1973).
90.pdf
(1.19 MB)
90. Disbelief, Poetry, and Religion
R. Hoffmann, Rendezvous (Idaho State University Journal of Arts and Letters), 31(2), 5-18 (1997).
disbelief_poetry_and_religion.pdf
(1.72 MB)
89. The Energy of Substituted Ethanes. Asymmetry Orbitals
L. Salem, R. Hoffmann and P. Otto, Proc. Nat. Acad. Sci., 70, 531 (1973).
89.pdf
(317.4 KB)
89. Mind the Shade
R. Hoffmann, Chemical and Engineering News, 75, 3 (Nov. 10, 1997).
mind_the_shade.pdf
(256.94 KB)
88. Das Konzept von der Erhaltung der Orbitalsymmetrie
(in German), R. Hoffmann and R. B. Woodward, Chemie in unserer Zeit, 6, 167 (1972); also appears under the title of Den reaktionskontrollerande orbitalsymmetrin (in Swedish); Kemisk Tidskrift, 85(3), 28 (1973).
88.pdf
(3.26 MB)
88. Truth on the Outside, a review of "On the Surface of Things," by Felice Frankel and George M. Whitesides
R. Hoffmann, a review of \"On the Surface of Things,\" by Felice Frankel and George M. Whitesides, Nature, 389, 348 (Sept.25, 1997).
truth_on_the_outside.pdf
(145.91 KB)
87. On Steric Attraction, R. Hoffmann, C. C. Levin and R. A. Moss
R. Hoffmann, C. C. Levin and R. A. Moss, J. Amer. Chem. Soc., 95, 629 (1973).
87.pdf
(375.18 KB)
87. How Can One Speak to All?
R. Hoffmann, Chemie Heute, 116-118 (1997).
how_can_one_speak_to_all.pdf
(857.2 KB)
86. The Effect of Protonation on Aziridine and Oxirane Bond Strength
W.-D. Stohrer and R. Hoffmann, Angew. Chem., 84, 820 (1972).
86. Thalidomide, at What Price?
R. Hoffmann, New York Times, Sept. 25, 1997, p. A31. Reprinted, in modified form, in Italian (tr. Sylvie Coyaud), in Il Sole - 24 Ore, Nov. 23, 1997.
thalidomide_at_what_price.pdf
(240.12 KB)
85. Strong Conformational Consequences of Hyperconjugation
R. Hoffmann, L. Radom, J. A. Pople, P. V. R. Schleyer, W. J. Hehre and L. Salem, J. Amer. Chem. Soc., 94, 6221 (1972).
85.pdf
(366.37 KB)
85. Scienziati, uscite dal guscio (in Italian, tr. Sylvie Coyaud)
R. Hofffmann Il Sole - 24 Ore, 28 (June 8, 1997).
85o.pdf
(29.62 KB)
84. The 9-Barbaralyl Cation
R. Hoffmann. W.-D. Stohrer and M. J. Goldstein, Bull. Chem. Soc. Japan, 45, 2513 (1972).
84.pdf
(279.29 KB)
84. Fraudulent Molecules
R. Hoffmann, American Scientist, 85(4), 314-317 (1997).
fraudulent_molecules.pdf
(934.92 KB)
83. Barrier to Rotation about the Phosphorus-Nitrogen Bond in Aminofluorophosphoranes. Relevance to Rearrangements in Five-Coordinate Compounds
E. L. Muetterties, P. Meakin and R. Hoffmann, J. Amer. Chem. Soc., 94, 5674 (1972).
83.pdf
(305.78 KB)
83. "Book review" of +The Responsible Conduct of Research" by Dore Beach and others
R. Hoffmann, Angew. Chem., Int. Ed. Engl., 36, 170-171 (1997).
responsible_conduct_of_research_review.pdf
(328.93 KB)
82. Role of Torsion in the Chirality of Twisted Olefins
C. C. Levin and R. Hoffmann, J. Amer. Chem. Soc., 94, 3446 (1972).
82.pdf
(458.14 KB)
82. A Natural-Born Fiber
R. Hoffmann, American Scientist, 85, 21-22 (1997).
natural_born.pdf
(657.2 KB)
81. Crystal Structure of Dipotassium cis-Hexacyanobutenediide and the Electronic Structure of the Anion
E. Maverick, E. Goldish, J. Bernstein, K. N. Trueblood, S. Swaminathan and R. Hoffmann, J. Amer. Chem. Soc., 94, 3364 (1972).
81.pdf
(765.32 KB)
81. Ethical Issues in Research
R. Hoffmann, Future, The Hoechst Magazine, 66-69 (1996).
ethical_issues_in_research.pdf
(1.37 MB)
80. Molecular Orbital Theory of Pentacoordinate Phosphorus
R. Hoffmann, J. M. Howell and E. L. Muetterties, J. Amer. Chem. Soc., 94, 3047 (1972).
80s_0.pdf
(1.33 MB)
80. Teach to Search
R. Hoffmann J. Chem. Educ., 73(9), A202-A209 (1996).
teach_to_search.pdf
(2.37 MB)
79. Orbital Theory of Heterolytic Fragmentation and Remote Effects on Nitrogen Inversion Equilibria
R. Gleiter, W.-D. Stohrer and R. Hoffmann, Helv. Chim. Acta, 55, 893 (1972).
79.pdf
(645.01 KB)
79. Cs3Te22, The One We Now Know
R. Hoffmann, American Scientist, 84, 327-329 (1996).
cs3te22_the_one_we_now_know.pdf
(603.05 KB)
78. Bond Stretch Isomerism and Polytopal Rearrangements in (CH)5+, (CH)5-, and (CH)4CO
W.-D. Stohrer and R. Hoffmann, J. Amer. Chem. Soc., 94, 1661 (1972).
78s_0.pdf
(761.59 KB)
78. Ockham's Razor and Chemistry
R. Hoffmann, V.I. Minkin, and B.K. Carpenter, Bul. Soc. Chim. France, 133, 117-130 (1996); Reprinted in Hyle, 3, 3-28 (1997).
ockhams_razor_and_chemistry.pdf
(5.34 MB)
77. Potential Surfaces for the Addition of CH2 and CF2 to Ethylene and Isobutene
R. Hoffmann, D. M. Hayes and P. S. Skell, J. Phys. Chem., 76, 664 (1972).
77.pdf
(558.72 KB)
77. Just A Little Bit Unnatural
R. Hoffmann. Art Journal, 55(1), 62-63 (1996).
just_a_little_bit_unnatural.pdf
(703.65 KB)
76. A Potential Energy Surface for the Addition of Benzyne to Ethylene
D. M. Hayes and R. Hoffmann, J. Phys. Chem., 76, 656 (1972).
76.pdf
(862.65 KB)
76. Research Strategy: Teach
R. Hoffmann, American Scientist, 84, 20-22 (1996); J. College Science Teaching, 26(1), 49-51 (1996).
research_strategy_teach.pdf
(803.04 KB)
75. The Electronic Structure and Reactivity of Strained Tricyclic Hydrocarbons
W.-D. Stohrer and R. Hoffmann, J. Amer. Chem. Soc., 94, 779 (1972).
75.pdf
(771.86 KB)
75. Some Heretical Thoughts on What Our Students Are Telling Us
R. Hoffmann and B.P. Coppola, J. Coll. Sci. Teach., XXV, 390-394 (1996).
74. Zur Stabilisiering des Phenyl-Kations
R. Gleiter, R. Hoffmann and W.-D. Stohrer, Chem. Ber., 105, 8 (1972).
zur stabilisierung.pdf
(1.22 MB)
74. Hwang-Sa, The Yellow Dust
R. Hoffmann. (in Korean) Shisa Journal, 66-67 (June 22, 1995).
73. The Stabilization of Bridged Structures of Ethanes
R. Hoffmann and J. E. Williams, Jr., Helv. Chim. Acta, 55, 67 (1972).
73.pdf
(414.42 KB)
73. C2 In All Its Guises
R. Hoffmann, American Scientist, 83, 309-311 (1995).
c2_in_all-_its_guises.pdf
(629.35 KB)
72. The Theoretical Design of Novel Stabilized Systems
R. Hoffmann, Pure and Appl. Chem., 28, 181 (1971).
72.pdf
(280.44 KB)
72. Bound for Glory
R. Hoffmann, in Scientific American: Triumph of Discovery: A Chronicle of Great Adventures in Science, Henry Holt and Co., New York, pp. 144-147 (1995).
bound_for_glory.pdf
(489.39 KB)
71. The Cope Rearrangement Revisited
R. Hoffmann and W.-D. Stohrer, J. Amer. Chem. Soc., 93, 6941 (1971).
71s_0.pdf
(831.18 KB)
71. Glass: A Way to Store Radioactive Wastes
R. Hoffmann, (in Korean), Shisa Journal, 90-91 (April 13, 1995).
70. Theory of the Structure and Reactivity of Small Rings
R. Hoffmann, Special Lectures at XXIIIrd International Congress of Pure and Applied Chemistry, Vol. 2, p. 233, Butterworths, London, 1971.
70. New Molecules That Look Like Trees or a Burst of Fireworks
R. Hoffmann, (in Korean), Shisa Journal (Feb. 23, 1995); (in Spanish), Alephzero 1, Sintesis, Puebla, Mexico, p. 5 (Sept. 4, 2003).
69. The Chemical Consequences of Orbital Interaction Through Space and Through Bonds
R. Hoffmann and W.-D. Stohrer, Special Lectures at XXXIIIrd International Congress of Pure and Applied Chemistry, Vol. 1, p. 157, Butterworths, London, 1971.
69. Letter to Former Graduate Students and Postdoc
R. Hoffmann, Chemical Intelligencer, 1(1), 44-46 (1995).
68. Through Bond Interactions of Non-Bonding Orbitals: the n,π* States of Azanaphthalenes
A. D. Jordan, I. G. Ross, R. Hoffmann, J. R. Swenson and R. Gleiter, Chem. Phys. Lett., 10, 572 (1971).
68.pdf
(486.01 KB)
68. Classical Democracy and Scientific Expertise
R. Hoffmann, American Scientist, 83, 23-25 (1995).
classical_democracy_and_scientific_expertise.pdf
(722.32 KB)
67. Symmetry, Topology and Aromaticity
M. J. Goldstein and R. Hoffmann, J. Amer. Chem. Soc., 93, 6193 (197l).
67s_0.pdf
(1.16 MB)
67. Too Much of Something Good
R. Hoffmann, (in Korean), Shisa Journal, 96-97 (Dec. 15, 1994).
66. A Potential Surface for the Insertion of Singlet Methylene into a C-H Bond
R. C. Dobson, D. Hayes and R. Hoffmann, J. Amer. Chem. Soc., 93, 6188 (197l).
66.pdf
(478.25 KB)
66. New Ways to Get Clothes Clean
R. Hoffmann, (in Korean), Shisa Journal, 76-77 (Nov. 3, 1994).
65. The Valence Orbitals of Cyclobutane
R. Hoffmann and R. B. Davidson, J. Amer. Chem. Soc., 93, 5699 (1971).
65s_0.pdf
(809.63 KB)
65. "Preface" for French and English editions of "Elements de Chimie quantique â l'usage des chimistes"
R. Hoffmann, Preface for French and English editions of Elements de Chimie quantique â l'usage des chimistes, 2nd edition, by Jean-Louis Rivail, InterEditions, Paris, (1994).
64. Chemical Reactivity of Molecules in their Excited States
R. Hoffmann in Aspects de la Chimie Quantique Contemporaine, ed. R. Daudel and A. Pullman, CNRS, Paris, (1971).
64. Number One This Week, For the 500th Week in a Row,
R. Hoffmann , (in Korean), Shisa Journal, 78-79 (August 25, 1994).
63. Structural Effects of 3d Orbitals in Alkylidene Phosphoranes
D. B. Boyd and R. Hoffmann, J. Amer. Chem. Soc., 93, 1064 (1971).
63.pdf
(356.47 KB)
63. Just a Little Bit Unnatural
R. Hoffmann, (in Korean), Shisa Journal, 70-71 (June 30, 1994).
62. A Potential Surface for a Nonlinear Cheletropic Reaction. The Decarbonylation of Cyclopropane
D. M. Hayes, C. A. Zeiss and R. Hoffmann, J. Phys. Chem., 75, 340 (197l).
62.pdf
(571.34 KB)
62. "Geleitwort" for "Chemische Kabinettstuecke" by H.W. Roesky and K. Moeckel
R. Hoffmann, Preface for Chemische Kabinettstucke by H.W. Roesky and K. Mockel (Weinheim: VCH, 1994), v-vii.
61. Interaction of Orbitals Through Space and Through Bonds
R. Hoffmann, Accts. Chem. Res., 4, 1 (1971).
61s_0.pdf
(1020.48 KB)
60. Geometry Changes in Excited States
R. Hoffmann, Pure and Appl. Chem., 24, 567 (1970).
60.pdf
(400.94 KB)
60. Fixing Nitrogen
R. Hoffmann, (in Korean), Shisa Journal, 74-76 (May 5, 1994).
59. The Interaction of Nonbonding Orbitals in Carbonyls
J. R. Swenson and R. Hoffmann, Helv. Chim. Acta, 53, 2331 (1970).
59.pdf
(435.06 KB)
59. A Molecule is a Molecule
R. Hoffmann, (in Korean), Shisa Journal, 76-77 (March 10, 1994).
58. A Potential Surface for a Nonconcerted Reaction. Tetramethylene
R. Hoffmann, S. Swaminathan, B. G. Odell and R. Gleiter, J. Amer. Chem. Soc., 92, 7091 (1970).
58s_0.pdf
(784.34 KB)
58. Pure/Impure
R. Hoffmann and S. Leibowitz, New England Review, 16(1), 41-64 (1994).
pure_impure.pdf
(3.78 MB)
57. The 2,3-Dimethylenetetramethylene Diradical
B. G. Odell, R. Hoffmann and A. Imamura, J. Chem. Soc. (B), 1675 (1970).
the 2,3-dimethylene.pdf
(428 KB)
56. Planar Tetracoordinate Carbon
R. Hoffmann, R. W. Alder and C. F. Wilcox, Jr., J. Amer. Chem. Soc., 92, 2992 (1970).
56s_0.pdf
(2.84 MB)
56. "Reactions Speak Louder Than Words", book review of "La Parole des Choses"
R. Hoffmann, book review of La Parole des Choses by Pierre Laszlo, Nature, 368, 361 (March 24, 1994).
55. The Norcaradiene-Cycloheptatriene Equilibrium
R. Hoffmann, Tetrah. Let., 11, 2907 (1970).
55.pdf
(143.54 KB)
55. Quimica, Democrcia i la Disputa de Barcelona
R. Hoffmann (in Catalan, translated by Santiago Alvarez), Butll. Soc. Catalanes Fis. Quim. Mat. Tecnol. XIV(1), 13-21 (1993).
54. Bonding, Proton Transfer and Diradical Stabilization in Phosphonium Ylides
R. Hoffmann, D. B. Boyd and S. Z. Goldberg, J. Amer. Chem. Soc., 92, 3929 (1970).
54.pdf
(819.87 KB)
54. Art and Chemistry
R. Hoffmann, Herbert F. Johnson Museum of Art Annual Report, 9-11 (1992-3).
art_and_chemistry.pdf
(596.28 KB)
53. The Interaction of Sulfur Atoms with Ethylene, R. Hoffmann
R. Hoffmann, C. C. Wan and V. Neagu, Mol. Phys., 19, 113 (1970).
53s_0.pdf
(486.92 KB)
53. The Four Elements
R. Hoffmann and V. Torrence, The Sciences, 28-31 (Nov./Dec. 1993). (This is essentially an excerpt from No. 40-43, or from Chemistry Imagined); translated into Greek by Maria-Eleni Spiridaki, Chemica Chronica, 57(1), 11-13 (1995).
the_four_elements.pdf
(920.48 KB)
52. The Direct Calculation of Optical Rotatory Strengths
R. R. Gould and R. Hoffmann, J. Amer. Chem. Soc., 92, 1813 (1970).
52.pdf
(592.01 KB)
52. "Transformation", preface to catalogue for the art exhibition "Creative Solutions to Ecological Issues"
R. Hoffmann, preface to catalogue for the art exhibition "Creative Solutions to Ecological Issues," by Gail Gelburd, Council for Creative Projects and University of Pennsylvania Press, 1993, p. 5.
transformation.pdf
(411.46 KB)
51. Non-Least-Motion Potential Surfaces: the Dimerization of Methylenes and Nitroso Compounds
R. Hoffmann, R. Gleiter and F. B. Mallory, J. Amer. Chem. Soc., 92, 1460 (1970).
51s_0.pdf
(759.62 KB)
51. Of What Use Enediynes?
R. Hoffmann, American Scientist, 81, 324-326 (1993).
of_what_use_enediynes.pdf
(672.5 KB)
50. Interaction of Nonconjugated Double Bonds
R. Hoffmann, E. Heilbronner and R. Gleiter, J. Amer. Chem. Soc., 92, 706 (1970).
50s_0.pdf
(253.37 KB)
49. Orbital Symmetry Control of Chemical Reactions
R. Hoffmann and R. B. Woodward, Science, 167, 825 (1970).
49s_0.pdf
(1.63 MB)
49. Myth Busters
R. Hoffmann, The Times (London) Higher Education Supplement, June 21, 1993, p. 17-20. Reprinted in Der Katalyst (Bern), 60, 21-31 (1993); Chemistry in Action, 44, 2-5 (1994).
myth_busters.pdf
(810.37 KB)
48. Energy Parameters in Polypeptides. II. Semiempirical Molecular Orbital Calculations for Model Peptides
J. F. Yan, F. A. Momany, R. Hoffmann and H. A. Scheraga, J. Phys. Chem., 74, 420 (1970).
48.pdf
(1.4 MB)
48. Book Review of "Introduction to Cluster Chemistry", D.M.P. Mingos and D.J. Wales
R. Hoffmann in J. Chem. Soc. Faraday Trans., 89, 2109 (1993).
book_review_cluster.pdf
(1.16 MB)
47. Ground and Excited State Geometries of Benzophenone, R. Hoffmann and J. R. Swenson, J. Phys. Chem., 74, 415 (1970).
Ground and Excited State Geometries of Benzophenone, R. Hoffmann and J. R. Swenson, J. Phys. Chem., 74, 415 (1970).
47.pdf
(658.09 KB)
47. Book review of "Reflections On Symmetry In Chemistry...And Elsewhere"
R. Hoffmann, Book review of Reflections on Symmetry In Chemistry...And Elsewhere, by E. Heilbronner and J.D. Dunitz, Angew. Chem. Int. Ed. Engl., 32, 129-130 (1993).
book_review_-reflections.pdf
(270.76 KB)
46. The Conservation of Orbital Symmetry
R. B. Woodward and R. Hoffmann, Angew. Chem., 81, 797 (1969); Angew. Chem. Internat. Ed., 8, 781 (1969). Reprinted in book form by Verlag Chemie and Academic Press.
46. For The First Time, You Can See Atoms
Roald Hoffmann, American Scientist, 81, 11-12 (1993). Modified from essay in Chemistry Imagined.
for_the_first_time_you_can_see_atoms.pdf
(678.56 KB)
45. The Balance of Steric and Conjugative Effects in Phenyl-substituted Cations, Radicals, and Anions
R. Hoffmann, R. Bissell, and D.G. Farnum, J. Phys. Chem. 73, 1789 (1969).
45. How Should Chemists Think?
R. Hoffmann, Scientific American, 268, 66-73 (February 1993). As "Die Chemie zwischen Natur und Ideal" (in German), Spektrum der Wissenschaft, 68-77 (April 1993). As "Les choix du chimiste" (in French), Pour la Science, 68-76 (April 1993).
how_should_chemists_think.pdf
(576.54 KB)
44. The Electronic Ground States of Ortho, Meta and Para Benzynes
M. Gheorghiu and R. Hoffmann, Rev. Roum. de Chimie, 14, 947 (1969).
44s_0.pdf
(3.14 MB)
44. Some Reflections on Science in the Low-Income Economies
R. Hoffmann, The World Bank, PHREE Background Paper Series, Document PHREE/92/71 (1992); Current Science, 65, 300-306 (1993); Estudos e Documentes, CETEM (Rio de Janeiro), 20 (1993); (translated into Spanish by Carlos Chimal), Boletin de la Academia de la Investigacian Cientifica, 10, 37-95 (Jan.-Feb. 1993).
43. The Electronic Structure of Some Substituted Cyclobutadienes
M. Gheorghiu and R. Hoffmann, Rev. Roum. de Chimie, 14, 781 (1969).
43. Fire
R. Hoffmann, (in German), Kultur & Technik, 3, 43 (1992); (in German, English, and French), Sandoz Bulletin, 30(106), 23-31. From Chemistry Imagined.
42. Hetaryne Intermediates
W. Adam, A. Grimison and R. Hoffmann, J. Amer. Chem. Soc., 91, 2590 (1969).
42.pdf
(932.7 KB)
42. Water
(in German), R. Hoffmann, Kultur & Technik, 3, 41 (1992); (in German, English, and French), Sandoz Bulletin, 30(106), 23-31. From Chemistry Imagined.
41. A Quantum Mechanical Approach to the Conformational Analysis of Macro-molecules in Ground and Excited States
R. Hoffmann and A. Imamura, Biopolymers, 7, 207 (1969).
41.pdf
(374.99 KB)
41. Earth
(in German) R. Hoffmann, Kultur & Technik, 3, 39 (1992); (in German, English, and French), Sandoz Bulletin, 30(106), 23-31. From Chemistry Imagined.
40. Formal Diradicals Which Should Have Singlet Ground States
R. Gleiter and R. Hoffmann, Angew. Chem., 81, 225 (1969).
40. Air
(in German), R. Hoffmann, Kultur & Technik, 3, 37 (1992); (in German, English, and French), Sandoz Bulletin, 30(106), 23-31. From Chemistry Imagined.
39. Symmetry Requirements for the Stabilization of One Class of Diradicals
R. Hoffmann, Chem. Commun., 240 (1969).
39s_0.pdf
(241.69 KB)
39. Do Mythic Heroes Pervert the Beauty of Scientific Research?
R. Hoffmann, ScienceWriters, 40(2), 3-4 (1992).
38. Transition State for the Hydrogen-Iodine and the Hydrogen Exchange Reaction
R. Hoffmann, J. Chem. Phys., 49, 3739 (1968).
38.pdf
(387.88 KB)
38. Theory and Practice
R. Hoffmann, American Scientist, 80, 310-311 (1992). From Chemistry Imagined.
theory_and_practice.pdf
(543.23 KB)
37. On Stabilizing a Singlet Methylene, R. Gleiter and R. Hoffmann
R. Gleiter and R. Hoffmann, J. Amer. Chem. Soc., 90, 5457 (1968).
37s_0.pdf
(398.72 KB)
37. We are Doomed to Innovating
R. Hoffmann (in Russian), Vestnik Rossiiskoi Akademii Nauk, 4, 3-5 (1992); (translated into English) Herald of the Russian Academy of Sciences, 62(5), 297-298 (1992).
we_are_doomed_to_innovating.pdf
(405.69 KB)
36. Book review of "The Clock Runs Backwards"
R. Hoffmann, Carl Djerassi, Interdisciplinary Science Reviews, 17(1), 96 (1992).
36. The Electronic Structure and Torsional Potentials in Ground and Excited States of Biphenyl, Fulvalene and Related Compounds
A. Imamura and R. Hoffmann, J. Amer. Chem. Soc., 90, 5379 (1968).
36.pdf
(691.02 KB)
35. Art and Science, Money and Morals
R. Hoffmann, American Scientist, 80, 10-11 (1992). Reprinted, under the title "Art, Science Offer Freedom but Entail Responsibility" in The Scientist, 6(19), 13 (1992).
art_and_science_money_and_morals.pdf
(673.4 KB)
35. The Stabilization of Centers with Six Valence Electrons Through Electron-Rich Three-Center Bonding
R. Gleiter and R. Hoffmann, Tetrahedron, 24, 5899 (1968)
35s_0.pdf
(907.96 KB)
34. Tikkun
R. Hoffmann, Cornell Alumni News, 94(5), 43 (Dec. 1991). From Chemistry Imagined.
34. The Isocyanide-Cyanide and Isoelectronic Rearrangements
G. W. Van Dine and R. Hoffmann, J. Amer. Chem. Soc., 90, 3227 (1968).
34.pdf
(559.58 KB)
33. The Top Ten
R. Hoffmann, Cornell Alumni News, 94(5), 41 (Dec. 1991). From Chemistry Imagined.
33. Hydrogen Bonding in Pyridine
W. Adam, A. Grimison, R. Hoffmann and C. Zuazaga de Ortiz, J. Amer. Chem. Soc., 90, 1509 (1968).
33.pdf
(900.53 KB)
32. Radium
R. Hoffmann, Cornell Alumni News, 94(5), 37 (Dec. 1991). From Chemistry Imagined.
32. Benzynes, Dehydroconjugated Molecules and the Interaction of Orbitals Separated by a Number of Intervening Sigma Bonds
R. Hoffmann, A. Imamura and W. J. Hehre, J. Amer. Chem. Soc., 90, 1499 (1968).
32s_0.pdf
(1.23 MB)
31. The Electronic Structure of Methylenes
R. Hoffmann, G. D. Zeiss and G. W. Van Dine, J. Amer. Chem. Soc., 90, 1485 (1968).
31s_1.pdf
(1.43 MB)
31. "Preface" for "Chemistry of Superconductor Materials"
R. Hoffmann, Preface for Chemistry of Superconductor Materials, ed. T.A. Vanderah, Noyes Publ., Park Ridge, 1992, pp. ix-x.
30. Trimethylene and the Addition of Methylene to Ethylene
R. Hoffmann, J. Amer. Chem. Soc., 90, 1475 (1968).
30s_1.pdf
(1.23 MB)
30. Signs and Portents: No Parking in the Courtroom
S. Leibowitz and R. Hoffmann, Diacritics, 21(1), 2-23 (1991).
signs_and_portents.pdf
(3.31 MB)
29. The Conservation of Orbital Symmetry
R. Hoffmann and R. B. Woodward, Accounts of Chemical Research, 1, 17 (1968).
29.pdf
(643.29 KB)
29. "Foreword" to "Creativity, Delayed Recognition, and Other Essays: Essays of an Information Scientist"
R. Hoffmann, Foreword to Creativity, Delayed Recognition, and Other Essays: Essays of an Information Scientist, by Eugene Garfield, volume 12, ISI Press, Philadelpha, 1991, pp. xi-xii. Reprinted in Current Contents, 50, 9-10 (Dec. 23-30, 1991).
28. The Spirarenes
R. Hoffmann, A. Imamura and G. D. Zeiss, J. Amer. Chem.Soc., 89, 5215 (1967).
28s_1.pdf
(575.92 KB)
28. "Faszination Chemie, 7000 Jahre Kulturgeschichte der Stoffe und Prozesse", by O. Krâtz, book reviewview, Angew. Chem. Int. Ed. Engl., 30(8), 1046 (1991).
R. Hoffmann, Angew. Chem. Int. Ed. Engl., 30(8), 1046 (1991).
faszination_chemie.pdf
(1.6 MB)
27. The Electronic Structure of Some Transition States and Intermediates in Organic Reactions
R. Hoffmann, Trans. N.Y. Acad. Sci., 28, 475 (1966).
27. Hot Brines in the Red Sea
R. Hoffmann, American Scientist, 79, 298-299 (1991).
hot_brines_in_the_red_sea.pdf
(618.27 KB)
26. The Dependence of Conformational and Isomer Stability on the Number of Electrons in Extended-Systems
R. Hoffmann and R.A.Olofson, J. Amer. Chem. Soc., 88, 943 (1966).
26.pdf
(454.79 KB)
26. Molecular Mimicry, Rachel and Leah, The Israeli Male, and the Inescapable Metaphor in Science
R. Hoffmann and S. Leibowitz, Michigan Quarterly Review, 30(3), 382-397 (1991).
molecular_mimicry.pdf
(3.12 MB)
25. Extended Hückel Theory. VI. Excited States and Photochemistry of Diazirines and Diazomethanes
R. Hoffmann, Tetrahedron, 22, 539 (1966).
25.pdf
(522.05 KB)
25. Soviet Emigre Talent: A Windfall for U.S. Employers
R. Hoffmann, The Wall Street Journal, June 24, 1991, p. 10.
soviet_emigre_talent.pdf
(367.64 KB)
24. Extended Hückel Theory. V. Cumulenes, Polyenes, Polyacetylenes and Cn
R. Hoffmann, Tetrahedron, 22, 521 (1966).
24.pdf
(1.22 MB)
24. Why Scientists (or Engineers) Shouldn't Run the World
R. Hoffmann, Issues in Science and Technology, VII(2), 38-39 (1991); in modified form, under the title \"Anti-Plato\" in the Bulletin of the Institute for Theological Encounter with Science and Technology, 24(2) (1993).
scientists_shouldnt_run_the_world.pdf
(485.17 KB)
23. Some Theoretical Observations on Cyclopropane
R. Hoffmann, Tetrahedron Letters, 3819 (1965).
23s_1.pdf
(241.19 KB)
23. In Praise of Synthesis
R. Hoffmann, Negative Capability, X(2 & 3), 162-175 (1990); in Russian, Khimia i Zhizn', 5, 61-66 (1990); American Scientist, 79, 11-14 (1991); in French in Alliage, 9, 65-75 (Fall 1991); in Portuguese, Quimica, 49, 28-31 (1993).
23.pdf
(666.49 KB)
22. Orbital Symmetries and Orientational Effects in a Sigmatropic Reaction
R. Hoffmann and R. B. Woodward, J. Amer. Chem. Soc., 87, 4389 (1965).
22s_1.pdf
(237.04 KB)
22. Molecular Beauty
R. Hoffmann, J. Aesthetics and Art Criticism, 48(3), 191-204 (1990). This is a composite version, with changes, of papers 8, 9, 11 and 12; Interdisciplinary Science Revs., 16, 301-312 (1991); (in Korean, in modified form) Hyundae Moonhak, 467, 261-271 (Nov. 1993).
molecular_beauty.pdf
(5.06 MB)
21. Natural/Unnatural
R. Hoffmann, New England Review and Bread Loaf Quarterly, XII(4), 323 (1990); Reprinted in Interdisciplinary Science Revs., 16, 161-167 (1991). Reprinted in Science, Technology and Society (Lehigh Univ.), 79, 1 (1990). Reprinted in modified form in M. D. Joesten, D. O. Johnston, J. T. Netterville and J. L. Wood, The World of Chemistry, Saunders, Philadelphia, 1991, p. 23. Reprinted in New England Review, 15(1), 234-243 (1993) (Fifteenth Anniversary Anthology). Translated into Spanish by Angela Cacho Castillo, Revista Universitaria (Santiago, Chile), 45, 16-22 (1994). Translated into Polish by Dorota Bank-Hammermeister and Danuta Sobczynska, in Teoria-Technika-Eksperyment (Poznan: Wydawnictwo Naukowe IFUAM), 11-28 (1995). Reprinted in Spanish in Relaciones (Montevideo, Uruguay), 154, 11-13 (March 1997).
natural_unnatural.pdf
(2.86 MB)
21. Orbital Symmetries and Endo/Exo Relationships in Concerted Cycloaddition Reactions
R. Hoffmann and R. B. Woodward, J. Amer.Chem. Soc., 87, 4388 (1965).
21s_1.pdf
(254.33 KB)
20. Selection Rules for Sigmatropic Reactions
R. B. Woodward and R. Hoffmann, J. Amer. Chem. Soc., 87, 2511 (1965).
20s_1.pdf
(370.24 KB)
20. Art in Science?
R. Hoffmann, Q (A Journal of Art), 62-65 (May 1990); Ometeca (in English and Spanish), I(2)-II(1), 83-102 (1989-90); Current Science, 60(6), 346-349 (1991).
art_in_science.pdf
(871.65 KB)
19. Chemistry, Democracy, and a Response to the Environment
R. Hoffmann, Chemical and Engineering News, 68(17), 25-29 (April 23, 1990); in modified form, in Greek, in Chimika Chronika, 54(1), 4-8 (1992); in modified form, under the title \"Rational Limits,\" in Boston College Magazine, 51(3), 30-35 (1992).
19. Selection Rules for Concerted Cycloaddition Reactions
R. Hoffmann and R. B. Woodward, J. Amer. Chem. Soc., 87, 2046 (1965).
19s_1.pdf
(317 KB)
18. Creation and Discovery
R. Hoffmann, American Scientist, 78, 14 (1990); reprinted in Rev. Roum. Chim. 35, 305-308 (1990). Also in Chemistry Imagined.
creation_and_discovery.pdf
(650.48 KB)
18. Stereochemistry of Electrocyclic Reactions
R. B. Woodward and R. Hoffmann, J. Amer. Chem. Soc., 87, 395 (1965).
18s_1.pdf
(3.66 MB)
17. Blue As The Sea
R. Hoffmann, Liber, 1(2) (December 1989). Liber appears in English, French, German, Italian and Spanish as a supplement to the Times Literary Supplement, Le Monde, Frankfurter Allgemeine, L'Indice dei Libri del Mese, El Pais. Published in slightly different form in American Scientist, 78, 308 (1990).
blue as the sea.pdf
(492.73 KB)
17. An Extended Hückel Theory. IV. Carbonium Ions
R. Hoffmann, J. Chem. Phys., 40, 2480 (1964).
17.pdf
(917.82 KB)
16. Representation in Chemistry
R. Hoffmann and P. Laszlo; in French under the title \"La Representation en Chimie,\" Diogene, 147, 24 (1989); in English, ibid., p. 23. In slightly different form in German as \"Darstellungen in der Chemie die Sprache der Chemiker,\" Angewandte Chemie, 103, 1-16 (1991); Angewandte Chemie. Int. Ed. Engl., 30, 1-16 (1991). Translated into Polish by Danuta Sobczyhska and Pawel Zeidler, in Nowy Eksperymentalizm, Teoretycyzm, Reprezentacja, (Poznan: Wydawnictwo Naukowe Institutu Filozofii UAM), 133-174 (1994).
16. An Extended Hückel Theory. III. Compounds of Boron and Nitrogen
R. Hoffmann, J. Chem. Phys., 40, 2474 (1964).
16.pdf
(734.29 KB)
15. An Extended Huckel Theory. II. Sigma Orbitals in the Azines
R. Hoffmann, J.Chem. Phys., 40, 2745 (1964).
15.pdf
(304.1 KB)
15. University research and teaching: an enriching and inseparable combination
R. Hoffmann, The Boston Sunday Globe, November 5, 1989. First published, in slightly different form, in CUE (Cornell Undergraduate Education) 2(2), 1-3 (1989) under the title \"Research/Teaching: A Complex Dance\". Reprinted in By George (George Washington University), 1(9), 8 (1990). Reprinted, abbreviated, in College Digest, XX, XXX. Reprinted in Zh. Vsesoyuz. Khim. Obschestva im. Mendeleyeva, 35, 356 (1990).
university_research_and_teaching.pdf
(813.66 KB)
14. Toward an Understanding of Nonclassical Carbonium Ions
R. Hoffmann, J. Amer. Chem. Soc., 86, 1259 (1964).
14.pdf
(287.7 KB)
14. Can You Build a Succa from an Elephant?
R. Hoffmann, C.-S. Leibowitz and R. Hoffmann, The Jerusalem Post Magazine, Oct. 13, 1989, p. 4; under the title \"The Succa and the Elephant,\" The Jerusalem Post International Edition, Oct. 14, 1989, p. 11.
succa.pdf
(1.14 MB)
13. Distribution of Electronic Levels in Alkanes, R. Hoffmann
R. Hoffmann, J. Chem. Phys., 40, 2047 (1964).
13s_1.pdf
(174.85 KB)
13. Ignorance, Ignorantly Judged
R. Hoffmann, New York Times, Sept. 14, 1989, p. A29.
ignorance_ignorantly_judged.pdf
(329.65 KB)
12. Theoretical Investigation on Boron-Nitrogen Molecules
R. Hoffmann in Advances in Chemistry No. 42, American Chemical Society, Washington, p. 78 (1964).
12.pdf
(1.02 MB)
12. Molecular Beauty IV: Toward an Aesthetic Theory of Six-coordinate Carbon
Roald Hoffmann, American Scientist, 77, 330 (1989).
molecular_beauty_iv.pdf
(388.57 KB)
11. An Extended Hückel Theory. I. Hydrocarbons
R. Hoffmann, J. Chem Phys., 39, 1397 (1963).
11s_1.pdf
(1.14 MB)
11. Molecular Beauty III. As Rich As Need Be
Roald Hoffmann, American Scientist, 77, 177 (1989); in modified form in M. D. Joesten, D. O. Johnston, J. T. Netterville, and J. L. Wood, The World of Chemistry, Saunders, Philadelphia, 1991, p. 488. Also in Chemistry Imagined.
molecular_beauty_iii.pdf
(605.57 KB)
10. Intramolecular Isomerization and Transformations in Carboranes and Substituted Boron Hydrides
R. Hoffmann and W. N. Lipscomb, Inor. Chem., 2, 231 (1963).
10.pdf
(254.38 KB)
10. Under the Surface of the Chemical Article
Roald Hoffmann. Angew. Chem. Int. Ed., 27, 1593-1602 (1988); also, in German, under the title of "Die chemische Veroffentlichung--Entwicklung oder Erstarrung im Rituellen?" Angew. Chem., 100, 1653-1663 (1988); and in German, under the title "Sprachritual und Naturwissenschaft", Universitas, 45 (528), 580 (1990); as "Por tras do artigo de Quimica," in Portuguese, translated by M.J. Calhorda, in Quimica, 50, 44-52 (1993).
9. Excitons Theory by Second Quantization
R. Hoffmann, Rad. Res., 20, 140 (1963).
-ExcitonTheorySecond-1963.pdf
(413.79 KB)
9. Molecular Beauty II. Frogs About to be Kissed
Roald Hoffmann, American Scientist, 76, 604 (1988); in modified form in M. D. Joesten, D. O. Johnston, J. T. Netterville, and J. L. Wood, The World of Chemistry, Saunders, Philadelphia, 1991, p. 371.
molecular_beauty_ii.pdf
(514.81 KB)
8. Sequential Substitution Reactions on B10H10-2 and B12H12-2
R. Hoffmann and W. N. Lipscomb, J. Chem. Phys., 37, 520 (1963).
8.pdf
(455.15 KB)
8. Molecular Beauty I
Roald Hoffmann, American Scientist, 76, 389 (1988); also (in Japanese) in Kagaku To Kogyo, 42, 102 (1989). In modified form, in M. D. Joesten, D. O. Johnston, J. T. Netterville, and J. L. Wood, The World of Chemistry, Saunders, Philadelphia, 1991, p. 142.
molecular_beauty_i.pdf
(891.73 KB)
7. The Excited States of Helical Polymers
(In Russian) R. Hoffmann, Vestn. Moskov. Univ. Ser. Fiz. Astr., 69 (1962).
7. How I Work as Poet and Scientist
Roald Hoffmann, The Scientist, March 21, 1988, p. 10; in modified form, under the title "Language Under Stress," in The New Theater Review, 11, 16 (1994).
how_i_work.pdf
(546.23 KB)
6. The Boron Hydrides; LCAO-MO and Resonance Studies
R. Hoffmann and W. N. Lipscomb, J. Chem. Phys., 37, 2872 (1962).
6s_1.pdf
(12.57 MB)
6. Nearly Circular Reasoning
Roald Hoffmann American Scientist, 76, 182 (1988).
nearly_circular_reasoning.pdf
(1.28 MB)
5. Theory of Polyhedral Molecules. III. Population Analyses and Reactivities for the Carboranes
R. Hoffmann and W. N. Lipscomb, J. Chem. Phys., 36, 3489 (1962).
5.pdf
(124 KB)
4. Plainly Speaking
Roald Hoffmann, American Scientist, 75, 418 (1987).
plainly_speaking.pdf
(969.21 KB)
4. Theory of Polyhedral Molecules. II. A Crystal Field Model
R. Hoffmann and M. P. Gouterman, J. Chem. Phys., 36, 2189 (1962).
4s_1.pdf
(9.31 MB)
3. Two Unfortunate Trends
Roald Hoffmann in Critical Thinking, ed. Anne B. Grinols, Cornell University Press, Ithaca, 1984, p. 37. Republished by Wadsworth Publishing Co., Blemont, 1988, p. 69.
two_unfortunate_trends.pdf
(1.01 MB)
3. Theory of Polyhedral Molecules. I. Physical Factorizations of the Secular Equation
R. Hoffmann and W. N. Lipscomb, J. Chem. Phys., 36, 2179 (1962).
3s_1.pdf
(14.33 MB)
2. Efficient Low-Level Counting System for C11
J. B. Cumming and R. Hoffmann, Rev. Sci. Inst., 29, 1104 (1958).
2. Commentary (comments on the article by Leo Marx "Are Science and Society Going in the Same Direction")
Science, Technology and Human Values, 8, 10 (1983).
commentary.pdf
(616.41 KB)
1. Heats of Formation of Hexacalcium Dialumino Ferrite and Dicalcium Ferrite
E. S. Newman and R. Hoffmann, J. Res. NBS, 56, 313 (1956).