大学化学 >> 2021, Vol. 36 >> Issue (8): 2009044.doi: 10.3866/PKU.DXHX202009044

师生笔谈 上一篇    下一篇

教材中价层电子对互斥理论的问题探讨

李保山()   

  • 收稿日期:2020-09-18 录用日期:2020-10-04 发布日期:2020-12-11
  • 通讯作者: 李保山 E-mail:bsli@mail.buct.edu.cn
  • 作者简介:李保山,Email: bsli@mail.buct.edu.cn

Probe into the Issues about the Theory of Valence Shell Electron Pair Repulsion in Different Textbooks

Baoshan Li()   

  • Received:2020-09-18 Accepted:2020-10-04 Published:2020-12-11
  • Contact: Baoshan Li E-mail:bsli@mail.buct.edu.cn

摘要:

介绍国内外常用教材中对价层电子对互斥理论的应用描述,对比分析确定中心原子价层电子对数的主要方法,包括根据Lewis电子式确定法、根据中心原子的族数及配位原子提供的电子数确定法、根据基态中心原子的价电子数及配位原子的未成对电子数确定法及根据相关原子的基态价层电子总数及配位原子的八隅律确定法等,阐明不同方法的理论基础及物理意义,旨在形成对这一化学基本理论的共识,有利于初学者的理解和掌握。

关键词: 价键理论, 价层电子对互斥理论, 电子构型, 分子结构

Abstract:

This paper introduces the description in application of the theory of valence shell electron pair repulsion in textbooks at home and abroad. The main methods for determining the number of valence-layer electrons of the central atom are compared and analyzed, including the methods based on Lewis electronic determination method, the group number of the central atom and the number of electrons provided by the coordination atom, the valence electron number of the center atom in the ground state and the unpaired electron number of the coordination atom, and the total number of valence electrons of related atoms in the ground state and octet rule of coordination atoms. The theoretical basis and the physical meaning of the different methods are expounded. The main aim is to develop a consensus on this fundamental chemical theory to make it easy for the students to understand and master.

Key words: Valence theories, Valence shell electron pair repulsion, Electron configuration, Molecular structure

MSC2000: 

  • G64