University Chemistry ›› 2021, Vol. 36 ›› Issue (8): 2009044.doi: 10.3866/PKU.DXHX202009044

• Between Teacher and Student • Previous Articles     Next Articles

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

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