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2007-6-16 15:28:43

Transition Metal Chemistry: The Valence Shell in d-Block Chemistry



Transition Metal Chemistry: The Valence Shell in d-Block Chemistry
By Malcolm Gerloch, Edwin C. Constable,


Publisher: Wiley-VCH Verlag GmbH
Number Of Pages: 212
Publication Date: 1994-06
Sales Rank: 2986131
ISBN / ASIN: 3527292195
EAN: 9783527292196
Binding: Paperback
Manufacturer: Wiley-VCH Verlag GmbH
Studio: Wiley-VCH Verlag GmbH
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Book Description
This book is an eminently readable introduction to structure and bonding in transition metal chemistry. Owing to its non- mathematical and highly visual approach, it is one of the most accessible texts on the role of the valence shell in d-block chemistry.

Topics covered include * stability and reactivity of transition metal compounds in their various oxidation states * spectroscopic properties * magnetic properties

Additional details and special topics are discussed in boxed sections within the text. This book will be invaluable to students and instructors alike for its non-mathematical account of key concepts and as a source of explanations and references to sources of further information.

Book Info

By virtue of its non-mathematical and strongly visual approach to bonding, it provides a most accessible text on the varied nature of the valence shell in d-block chemistry. Paper. --This text refers to the Paperback edition.

Table of Contents

Preface
1 An Introduction to Transition-Metal Chemistry 1
2 Focus on the d[superscript n] Configuration 21
3 Crystal-Field Splittings 27
4 The Intensities of 'd - d' Spectra 61
5 Spin and Magnetism 77
6 Ligand Fields, Bonding and the Valence Shell 97
7 Steric Effects of Open d Shells 129
8 Complex Stability and Energetics 145
9 Chemical Consequences of the d-Electron Configuration 167
10 The Lanthanoid Series 197
Index
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附件TOP.PDF的内容:
Preface
1 An Introduction to Transition-Metal Chemistry 1
1.1 What is a Transition Element? 1
1.2 Complexes and Coordination Compounds 3
1.3 The Coordinate Bond 5
1.4 Ligand Types 5
1.5 Coordination Number 8
1.6 Geometrical Types and Isomers 9
1.7 Oxidation State 12
1.8 Electroneutrality Principle 14
1.9 Rationalization of Complex Geometries 15
1.10 Review of Properties of Transition-Metal Compounds 17
n
2 Focus on the d Configuration 21
2.1 Spectral Features 21
2.2 The Valence Shell 23
2.3 The Roles of d Electrons 26
3 Crystal-Field Splittings 27
3.1 The Crystal-Field Premise 27
3.2 Splitting of d Orbitals in Octahedral Symmetry 28
3.3 Splitting of d Orbitals in Tetrahedral and Other Symmetries 32
1 9
3.4 Holes: d and d 34
2
3.5 More Transitions for d 36
3.6 Atomic Orbitals and Terms 40
3.7 Crystal-Field Splitting of Free-Ion D Terms 44
3.8 Crystal-Field Splitting of Free-Ion F terms 46
3.9 Free-ion S and P Terms in Crystal Fields 48
n
3.10 Splitting Patterns for d Ground terms 52
3.11 Orgel Diagrams 56
3.12 Concluding Remarks 58
X Contents
4 The Intensities of 'd-d' Spectra 61
4.1 Transition Moments 61
4.2 Selection Rules 62
4.3 'Violation' of the Selection Rules 64
4.4 Intensity 'Stealing' 69
4.5 Two-Electron Jumps' 71
4.6 'Spin-Flip' Transitions 72
4.7 The Effects of Temperature Change 74
4.8 Summarizing Remarks 76
5 Spin and Magnetism 77
5.1 High-Spin and Low-Spin Configurations 77
5.2 The Qualitative Origin of Paramagnetism 79
5.3 Orbital Quenching' and the 'Spin-Only' Formula 88
5.4 Orbital Contributions 90
5.5 Orbital Contributions at the Strong-Field limit 93
5.6 The Chemical Relevance of Departures from
the Spin-Only Formula 95
5.7 Summary 96
6 Ligand Fields, Bonding and the Valence Shell 97
6.1 The Nephelauxetic Effect 97
6.2 The Spectrochemical Series 99
6.3 Bonding in Octahedral Complexes 102
6.3.1 Molecular Orbitals in Diatomic Molecules 102
6.3.2 Molecular Orbitals in Polyatomic Molecules 104
6.3.3 Molecular Orbitals for the Water Molecule 104
6.3.4 The Molecular Orbital Diagram for Octahedral Complexes:
Local M-L σ Bonding 108
6.3.5 Charge-Transfer Transitions 114
6.3.6 Metal - Ligand π Bonding 114
6.4 Ligand-Field Theory 117
6.5 Synergic Back-Bonding 121
6.6 Valence Shells in High and Low Oxidation States 124
6.7 Electroneutrality and the Elasticity of the d Shell 126
6.8 The Bonding Contributions of d Orbitals 127
7 Steric Effects of Open d Shells 129
7.1 Bond Lengths in Octahedral Complexes 129
7.2 Planar Coordination in d* Complexes 131
7.3 Trigonal Bipyramidal Coordination 135
7.4 The Jahn-Teller Effect 137
Contents XI
8 Complex Stability and Energetics 145
8.1 The Thermodynamic Stability of Complexes 145
8.2 The Chelate Effect and Polydentate Ligands 146
8.2.1 Thermodynamic Origins of the Chelate Effect 147
8.2.2 Contributions to the Chelate Effect - The Enthalpy 148
8.2.3 Contributions to the Chelate Effect - The Entropy 149
8.3 Ligand-Field Stabilization Energies 149
8.4 Energy and Structural Consequences in Real Systems 152
8.4.1 Hydration Energies of Transition-Metal(n) Ions 152
8.4.2 Lattice Energies of MCl Species 158
2
8.4.3 The Spinels 159
8.5 The Irving-Williams Series 161
9 Chemical Consequences of the rf-Electron Configuration 167
9.1 Introduction 167
9.2 Coordination Number and Geometry 167
9.2.1 Coordination Numbers in Low Oxidation State Complexes 172
9.3 Ligand types - The Concept of Hard and Soft 173
9.4 The Stabilization of Oxidation States, and Reduction Potentials 176
9.4.1 Reduction Potentials and Thermodynamics 176
9.4.2 Intermediate Oxidation States 176
9.4.3 The Electroneutrality Principle - A Reprise 179
9.4.4 Protic Equilibria Involving Coordinated Ligands 181
9.4.5 The Stabilization of High Oxidation States 184
9.4.6 d Orbitals, Covalent Character and Variable Oxidation States -
A Summary 184
9.5 Consequences of the d-Electron Configuration
upon Reaction Rates 186
9.5.1 Kinetically Inert and Labile Complexes 186
9.5.2 Ligand Substitution Reactions 186
9.5.3 Rates of Electron Transfer Reactions 189
10 The Lanthanoid Series 197
10.1 The Lanthanoid Contraction 197
10.2 The Core-Like Behavior of/Electrons 198
10.3 Magnetic Properties in the / Block 199
10.4 Spectral Features 203
Index


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