Abstract This article gave a reasonable explanation of the number of valence electrons provided by hydrogen, halogen and oxygen family acting as coordination atoms, and deduced a new method for calculating the number of valence shell electron pairs of the central atom. The method does not have to write the Lewis structure to determine the number of bonding pairs and lone pairs, and it is unnecessary to specify the number of valence electrons provided by atoms of different families as coordination atoms. The number of valence shell electron pairs of the central atom can be obtained directly according to the formula.
ZHENG Mu-Yan. Improvement of Valence Shell Electron Pair Repulsion Theory: New Method for Calculating the Number of Valence Shell Electron Pairs of Central Atom[J]. , 2019, 40(19): 93-95.