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Qualitative Valence-Bond Descriptions of Electron-Rich Molecules: Pauling “3-Electron Bonds” and “Increased-Valence” Theory

Pauling "3-Electron Bonds" and "Increased-Valence" Theory

  • Textbook
  • © 1982

Overview

Authors:
  1. R. D. Harcourt

    1. Department of Physical Chemistry, University of Melbourne, Parkville, Australia

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Part of the book series: Lecture Notes in Chemistry (LNC, volume 30)

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Table of contents (24 chapters)

  1. Front Matter

    Pages N2-X
    Download chapter PDF

  2. Atomic Orbitals, Electron Spin, Linear Combinations

    • R. D. Harcourt
    Pages 1-8

  3. Pauling “3-Electron Bonds”, 4-Electron 3-Centre Bonding, and the Need for an “Increased Valence” Theory

    • R. D. Harcourt
    Pages 9-30

  4. Wave-Functions and Valence-Bond Structures for 1-Electron Bonds, Electron-Pair Bonds, Pauling “3-Electron Bonds” and “No Bonds”

    • R. D. Harcourt
    Pages 31-47

  5. Valence-Bond Structures for Some Diatomic Molecules

    • R. D. Harcourt
    Pages 48-54

  6. Pauling “3-Electron Bonds” and Hypoligated Transition Metal Complexes

    • R. D. Harcourt
    Pages 55-62

  7. Pauling “3-Electron Bonds”, 5-Electron 3-Centre Bonding and Some Tetra-Atomic Radicals

    • R. D. Harcourt
    Pages 63-72

  8. Some Dimers of Triatomic Radicals with 17 and 19 Valence-Shell Electrons

    • R. D. Harcourt
    Pages 73-87

  9. Some Cu(II) Binuclear Transition-Metal Complexes

    • R. D. Harcourt
    Pages 88-99

  10. Excited States

    • R. D. Harcourt
    Pages 100-107

  11. Pauling “3-Electron Bonds” and “Increased Valence” Theory for N2O4

    • R. D. Harcourt
    Pages 108-113

  12. Pauling “3-Electron Bonds” and “Increased-Valence” Structures

    • R. D. Harcourt
    Pages 114-135

  13. Increased-Valence Structures Constructed from Lewis Structures: Delocalization of Lone-Pair Electrons into Vacant Bonding Orbitals

    • R. D. Harcourt
    Pages 136-139

  14. “Increased-Valence” Structures for N-Centre Bonding Units

    • R. D. Harcourt
    Pages 140-160

  15. Delocalization of Lone-Pair Electrons into Antibonding Orbitals: Increased-Valence Structures, Molecular Orbital Theory and Atomic Valencies

    • R. D. Harcourt
    Pages 161-170

  16. Slater Determinants and Wave-Functions for “Increased-Valence” Structures

    • R. D. Harcourt
    Pages 171-175

  17. Classical Valence Structures and Quinquevalent Nitrogen Atoms

    • R. D. Harcourt
    Pages 176-181

  18. Some Tetrahedral Molecules and dπ − Pπ Bonding for Some Sulphur Compounds

    • R. D. Harcourt
    Pages 182-192

  19. Transition Metal Complexes with CO, N2, NO and O2 Ligands

    • R. D. Harcourt
    Pages 193-205

  20. Some Electron-Excess σ Bonded Systems

    • R. D. Harcourt
    Pages 206-216
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Keywords

About this book

This book provides qualitative molecular orbital and valence-bond descriptions of the electronic structures for electron-rich molecules, with strong emphasis given to the valence-bond approach. Electron-rich molecules form an extremely large class of molecules, and the results of quantum mechanical studies from different laboratories indicate that qualitative valence-bond descriptions for many of these molecules are incomplete in so far as they usually omit "long-bond" Lewis structures from elementary descriptions of bonding. For example, the usual representation for the electronic structure of the ground-state for 03 involves resonance between the (+1 o and Until standard Lewis structures ~ ~ (-I . b:'" ~d· . . . . , recently, any contribution to resonance of the "long-bond" (or spin-paired o •• / •• ,. . has been largely ignored. diradica~ Lewis structure However, it :0 . 0. . e-. . . . . ______ " has now been calculated to be a very important structure. For the ground-states of numerous other systems, calculations also indicate that "long-bond" structures are more important than is usually supposed, and therefore they should frequently be included in qualitative valence-bond descriptions of electronic structure. The book describes how this may be done, and some of the resulting consequences for the interpretation of the electronic structure, bond properties and reactivities of various electron-rich molecules. When appropriate, molecular orbital and valence­ bond descriptions of bonding are compared, and relationships that exist between them are derived.

Authors and Affiliations

  • Department of Physical Chemistry, University of Melbourne, Parkville, Australia

    R. D. Harcourt

Bibliographic Information

  • Book Title: Qualitative Valence-Bond Descriptions of Electron-Rich Molecules: Pauling “3-Electron Bonds” and “Increased-Valence” Theory

  • Book Subtitle: Pauling "3-Electron Bonds" and "Increased-Valence" Theory

  • Authors: R. D. Harcourt

  • Series Title: Lecture Notes in Chemistry

  • DOI: https://doi.org/10.1007/978-3-642-93216-8

  • Publisher: Springer Berlin, Heidelberg

  • eBook Packages: Springer Book Archive

  • Copyright Information: Springer-Verlag Berlin Heidelberg 1982

  • eBook ISBN: 978-3-642-93216-8Published: 06 December 2012

  • Series ISSN: 0342-4901

  • Series E-ISSN: 2192-6603

  • Edition Number: 1

  • Number of Pages: X, 264

  • Topics: Theoretical and Computational Chemistry

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