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Lecture Notes in Chemistry

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

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

Authors: Harcourt, R. D.

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About this Textbook

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.

Table of contents (24 chapters)

Table of contents (24 chapters)
  • Atomic Orbitals, Electron Spin, Linear Combinations

    Pages 1-8

    Harcourt, R. D.

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

    Pages 9-30

    Harcourt, R. D.

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

    Pages 31-47

    Harcourt, R. D.

  • Valence-Bond Structures for Some Diatomic Molecules

    Pages 48-54

    Harcourt, R. D.

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

    Pages 55-62

    Harcourt, R. D.

Buy this book

eBook $99.00
price for USA in USD
  • ISBN 978-3-642-93216-8
  • Digitally watermarked, DRM-free
  • Included format: PDF
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
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Bibliographic Information

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
Series Title
Lecture Notes in Chemistry
Series Volume
30
Copyright
1982
Publisher
Springer-Verlag Berlin Heidelberg
Copyright Holder
Springer-Verlag Berlin Heidelberg
eBook ISBN
978-3-642-93216-8
DOI
10.1007/978-3-642-93216-8
Series ISSN
0342-4901
Edition Number
1
Number of Pages
X, 264
Topics

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