结构化学（南京大学） chapt4_handout1.pdf

第四章 对称性与群表示理论 I Symmetry Operations Story of Symmetry Geometrical Definitions Multiplication Table of Symmetry Operators Representation Theory of Group Symmetry operations of a Molecule Form a Group Matrix Representation of Point Group Character Table SALC and Molecular Orbitals, Walsh Correlation Diagram Symmetry Adapted Linear Combinations Molecular Symmetry in Variation Method Walsh Correlation Diagram AH , Another Example of Walsh’s Rule 2 Hybridization and Localized Molecular Orbitals Hybridization-Nature of Chemical Bond Bond Angles Calculated from Hybrid Orbitals Valence Shell Electron Pair Repulsion Symmetry Operations Story of Symmetry Geometrical Definitions Multiplication Table of Symmetry Operators Representation Theory of Group SALC and Molecular Orbitals, Walsh Correlation Diagram Hybridization and Localized Molecular Orbitals 对称是一种美 对称不仅仅意味着美 有时，也意味着更稳定！ 有时，”更危险” Article from:Science News Article date:January 26, 1991 Author:Amato, Ivan Title: C60: definitely a beauty, maybe a beast Since last August, physics graduate student Lowell D. Lamb and his co-workers at the University of Arizona in Tucson have donned gloves and masks when working with chemistry’s latest darling, ... ...If biologists were to happen upon a new animal species with teeth and claws, they would take precautions even though … 我们 已经知道这些 原子轨道 的对称性表示：s,p,d, 原子谱项的对称性表示：S, P, D, 同核双原子分子轨道 的对称性表示：σ ,σ ,π ,π , g u g u 同核核双原子分子谱项的对称性表示：Σ+, Π− , g u 异核双原子分子轨道 的对称性表示：σ,π,δ, 异核双原子分子谱项的对称性表示：Σ, Π,∆, 这些符号就