价层电子对互斥理论 (简称ＶＳＥＰＲ法 )是美国Ｓｅｄｇｗｉｃｋ和ｐｏｗｅｌｌ[1] 在 1 940年提出 ,后由其他学者逐步完善 ,建立的预测ＡＢｎ 分子或离子的几何构型理论。该理论假定中心原子内层电子是球形对称分布 ,对价层电子的排列无影响 ,仅用介层电子之间的斥力来判定分 The valence Electron Pair Mutual Exclusion (VSEPR) method was proposed by Sedgwick and Powell [1] in the United States in 1940 and later refined by other scholars to predict the geometrical configuration of ABn molecules or ions. The theory assumes that the central atom inner electron is spherical symmetric distribution, the valence electron has no effect on the arrangement, only the repulsion between the valence electrons to determine the points