所呈现的规律性可以用量子化学方法从π电子的共轭效应、构型的立体效应和分子形状大小等三个方面得到解释。
By means of a semi-empirical quantum chemical method , the principles concerned can be explained by the conjugation effect of π - electrons , the steric repulsion effect in configuration and the molecular shape and size .
电子共轭效应