Keywords:
Chemical bonds -- Congresses.
;
Electronic books.
Type of Medium:
Online Resource
Pages:
1 online resource (568 pages)
Edition:
1st ed.
ISBN:
9783527664689
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=1692000
DDC:
541.224
Language:
English
Note:
Intro -- The Chemical Bond -- Contents -- Preface -- List of Contributors -- Chapter 1 Chemical Bonding of Main-Group Elements -- 1.1 Introduction and Definitions -- 1.2 The Lack of Radial Nodes of the 2p Shell Accounts for Most of the Peculiarities of the Chemistry of the 2p-Elements -- 1.2.1 High Electronegativity and Small Size of the 2p-Elements -- 1.2.1.1 Hybridization Defects -- 1.2.2 The Inert-Pair Effect and its Dependence on Partial Charge of the Central Atom -- 1.2.3 Stereo-Chemically Active versus Inactive Lone Pairs -- 1.2.4 The Multiple-Bond Paradigm and the Question of Bond Strengths -- 1.2.5 Influence of Hybridization Defects on Magnetic-Resonance Parameters -- 1.3 The Role of the Outer d-Orbitals in Bonding -- 1.4 Secondary Periodicities: Incomplete-Screening and Relativistic Effects -- 1.5 "Honorary d-Elements": the Peculiarities of Structure and Bonding of the Heavy Group 2 Elements -- 1.6 Concluding Remarks -- References -- Chapter 2 Multiple Bonding of Heavy Main-Group Atoms -- 2.1 Introduction -- 2.2 Bonding Analysis of Diatomic Molecules E2 (E = N - Bi) -- 2.3 Comparative Bonding Analysis of N2 and P2 with N4 and P4 -- 2.4 Bonding Analysis of the Tetrylynes HEEH (E = C - Pb) -- 2.5 Explaining the Different Structures of the Tetrylynes HEEH (E = C - Pb) -- 2.6 Energy Decomposition Analysis of the Tetrylynes HEEH (E = C - Pb) -- 2.7 Conclusion -- Acknowledgment -- References -- Chapter 3 The Role of Recoupled Pair Bonding in Hypervalent Molecules -- 3.1 Introduction -- 3.2 Multireference Wavefunction Treatment of Bonding -- 3.3 Low-Lying States of SF and OF -- 3.4 Low-Lying States of SF2 and OF2 (and Beyond) -- 3.4.1 SF2(X1A1) -- 3.4.2 SF2(a3B1) -- 3.4.3 SF2(b3A2) -- 3.4.4 OF2(X1A1) -- 3.4.5 Triplet states of OF2 -- 3.4.6 SF3 and SF4 -- 3.4.7 SF5 and SF6 -- 3.5 Comparison to Other Models -- 3.5.1 Rundle-Pimentel 3c-4e Model.
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3.5.2 Diabatic States Model -- 3.5.3 Democracy Principle -- 3.6 Concluding Remarks -- References -- Chapter 4 Donor-Acceptor Complexes of Main-Group Elements -- 4.1 Introduction -- 4.2 Single-Center Complexes EL2 -- 4.2.1 Carbones CL2 -- 4.2.2 Isoelectronic Group 15 and Group 13 Homologues (N+)L2 and (BH)L2 -- 4.2.3 Donor-Acceptor Bonding in Heavier Tetrylenes ER2 and Tetrylones EL2 (E = Si - Pb) -- 4.3 Two-Center Complexes E2L2 -- 4.3.1 Two-Center Group 14 Complexes Si2L2 - Pb2L2 (L = NHC) -- 4.3.2 Two-Center Group 13 and Group 15 Complexes B2L2 and N2L2 -- 4.4 Summary and Conclusion -- References -- Chapter 5 Electron-Counting Rules in Cluster Bonding - Polyhedral Boranes, Elemental Boron, and Boron-Rich Solids -- 5.1 Introduction -- 5.2 Wade's Rule -- 5.3 Localized Bonding Schemes for Bonding in Polyhedral Boranes -- 5.4 4n+2 Interstitial Electron Rule and Ring-Cap Orbital Overlap Compatibility -- 5.5 Capping Principle -- 5.6 Electronic Requirement of Condensed Polyhedral Boranes - mno Rule -- 5.7 Factors Affecting the Stability of Condensed Polyhedral Clusters -- 5.7.1 Exo-polyhedral Interactions -- 5.7.2 Orbital Compatibility -- 5.8 Hypoelectronic Metallaboranes -- 5.9 Electronic Structure of Elemental Boron and Boron-Rich Metal Borides - Application of Electron-Counting Rules -- 5.9.1 α-Rhombohedral Boron -- 5.9.2 β-Rhombohedral Boron -- 5.9.3 Alkali Metal-Indium Clusters -- 5.9.4 Electronic Structure of Mg~5B44 -- 5.10 Conclusion -- References -- Chapter 6 Bound Triplet Pairs in the Highest Spin States of Monovalent Metal Clusters -- 6.1 Introduction -- 6.2 Can Triplet Pairs Be Bonded? -- 6.2.1 A Prototypical Bound Triplet Pair in 3Li2 -- 6.2.2 The NPFM Bonded Series of n+1Li_n (n=2-10) -- 6.3 Origins of NPFM Bonding in n+1Li_n Clusters -- 6.3.1 Orbital Cartoons for the NPFM Bonding of the 3Σu+ State of Li2.
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6.4 Generalization of NPFM Bonding in n+1Li_n Clusters -- 6.4.1 VB Mixing Diagram Representation of the Bonding in 3Li_2 -- 6.4.2 VB Modeling of n+1Li_n Patterns -- 6.5 NPFM Bonding in Coinage Metal Clusters -- 6.5.1 Structures and Bonding of Coinage Metal NPFM Clusters -- 6.6 Valence Bond Modeling of the Bonding in NPFM Clusters of the Coinage Metals -- 6.7 NPFM Bonding: Resonating Bound Triplet Pairs -- 6.8 Concluding Remarks: Bound Triplet Pairs -- Appendix -- 6.A Methods and Some Details of Calculations -- 6.B Symmetry Assignment of the VB Wave Function -- 6.C The VB Configuration Count and the Expressions for De for NPFM Clusters -- References -- Chapter 7 Chemical Bonding in Transition Metal Compounds -- 7.1 Introduction -- 7.2 Valence Orbitals and Hybridization in Electron-Sharing Bonds of Transition Metals -- 7.3 Carbonyl Complexes TM(CO)6q (TMq = Hf2-, Ta-, W, Re+, Os2+, Ir3+) -- 7.4 Phosphane Complexes (CO)5TM-PR3 and N-Heterocyclic Carbene Complexes (CO)5TM-NHC (TM = Cr, Mo, W) -- 7.5 Ethylene and Acetylene Complexes (CO)5TM-C2Hn and Cl4TM-C2Hn (TM = Cr, Mo, W) -- 7.6 Group-13 Diyl Complexes (CO)4Fe-ER (E = B - Tl -- R = Ph, Cp) -- 7.7 Ferrocene Fe(η5-Cp)2 and Bis(benzene)chromium Cr(η6-Bz)2 -- 7.8 Cluster, Complex, or Electron-Sharing Compound? Chemical Bonding in Mo(EH)12 and Pd(EH)8 (E = Zn, Cd, Hg) -- 7.9 Metal-Metal Multiple Bonding -- 7.10 Summary -- Acknowledgment -- References -- Chapter 8 Chemical Bonding in Open-Shell Transition-Metal Complexes -- 8.1 Introduction -- 8.2 Theoretical Foundations -- 8.2.1 Definition of Open-Shell Electronic Structures -- 8.2.2 The Configuration Interaction Ansatz -- 8.2.2.1 The Truncation Procedure -- 8.2.2.2 Density Matrices -- 8.2.3 Ab Initio Single-Reference Approaches -- 8.2.4 Ab Initio Multireference Approaches -- 8.2.5 Density Functional Theory for Open-Shell Molecules.
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8.3 Qualitative Interpretation -- 8.3.1 Local Spin -- 8.3.2 Broken Spin Symmetry -- 8.3.3 Analysis of Bond Orders -- 8.3.4 Atoms in Molecules -- 8.3.5 Entanglement Measures for Single- and Multireference Correlation Effects -- 8.4 Spin Density Distributions-A Case Study -- 8.4.1 A One-Determinant Picture -- 8.4.2 A Multiconfigurational Study -- 8.5 Summary -- Acknowledgments -- References -- Chapter 9 Modeling Metal-Metal Multiple Bonds with Multireference Quantum Chemical Methods -- 9.1 Introduction -- 9.2 Multireference Methods and Effective Bond Orders -- 9.3 The Multiple Bond in Re2Cl82- -- 9.4 Homonuclear Diatomic Molecules: Cr2, Mo2, and W2 -- 9.5 Cr2, Mo2, and W2 Containing Complexes -- 9.6 Fe2 Complexes -- 9.7 Concluding Remarks -- Acknowledgment -- References -- Chapter 10 The Quantum Chemistry of Transition Metal Surface Bonding and Reactivity -- 10.1 Introduction -- 10.2 The Elementary Quantum-Chemical Model of the Surface Chemical Bond -- 10.3 Quantum Chemistry of the Surface Chemical Bond -- 10.3.1 Adatom Adsorption Energy Dependence on Coordinative Unsaturation of Surface Atoms -- 10.3.2 Adatom Adsorption Energy as a Function of Metal Position in the Periodic System -- 10.3.3 Molecular Adsorption -- Adsorption of CO -- 10.3.4 Surface Group Orbitals -- 10.3.5 Adsorbate Coordination in Relation to Adsorbate Valence -- 10.4 Metal Particle Composition and Size Dependence -- 10.4.1 Alloying: Coordinative Unsaturation versus Increased Overlap Energies -- 10.4.2 Particle Size Dependence -- 10.5 Lateral Interactions -- Reconstruction -- 10.6 Adsorbate Bond Activation and Formation -- 10.6.1 The Reactivity of Different Metal Surfaces -- 10.6.2 The Quantum-Chemical View of Bond Activation -- 10.6.2.1 Activation of the Molecular π Bond (Particle Shape Dependence) -- 10.6.2.2 The Uniqueness of the (100) Surface.
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10.6.2.3 Activation of the Molecular σ Bond -- CH4 and NH3 -- 10.7 Transition State Analysis: A Summary -- References -- Chapter 11 Chemical Bonding of Lanthanides and Actinides -- 11.1 Introduction -- 11.2 Technical Issues -- 11.3 The Energy Decomposition Approach to the Bonding in f Block Compounds -- 11.3.1 A Comparison of U-N and U-O Bonding in Uranyl(VI) Complexes -- 11.3.2 Toward a 32-Electron Rule -- 11.4 f Block Applications of the Electron Localization Function -- 11.5 Does Covalency Increase or Decrease across the Actinide Series? -- 11.6 Multi-configurational Descriptions of Bonding in f Element Complexes -- 11.6.1 U2: A Quintuply Bonded Actinide Dimer -- 11.6.2 Bonding in the Actinyls -- 11.6.3 Oxidation State Ambiguity in the f Block Metallocenes -- 11.7 Concluding Remarks -- References -- Chapter 12 Direct Estimate of Conjugation, Hyperconjugation, and Aromaticity with the Energy Decomposition Analysis Method -- 12.1 Introduction -- 12.2 The EDA Method -- 12.3 Conjugation -- 12.3.1 Conjugation in 1,3-Butadienes, 1,3-Butadiyne, Polyenes, and Enones -- 12.3.2 Correlation with Experimental Data -- 12.4 Hyperconjugation -- 12.4.1 Hyperconjugation in Ethane and Ethane-Like Compounds -- 12.4.2 Group 14 β-Effect -- 12.5 Aromaticity -- 12.5.1 Aromaticity in Neutral Exocyclic Substituted Cyclopropenes (HC)2C = X -- 12.5.2 Aromaticity in Group 14 Homologs of the Cyclopropenylium Cation -- 12.5.3 Aromaticity in Metallabenzenes -- 12.6 Concluding Remarks -- References -- Chapter 13 Magnetic Properties of Aromatic Compounds and Aromatic Transition States -- 13.1 Introduction -- 13.2 A Short Historical Review of Aromaticity -- 13.3 Magnetic Properties of Molecules -- 13.3.1 Exaltation and Anisotropy of Magnetic Susceptibility -- 13.3.2 Chemical Shifts in NMR -- 13.3.3 Quantum Theoretical Treatment -- 13.4 Examples -- 13.4.1 Benzene and Borazine.
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13.4.2 Pyridine, Phosphabenzene, and Silabenzene.
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