摘要
ＸＹｎ型多核分子体系如中心原子电子云不是球型分布，分子的结构偏离ＶＳＥＰＲ法的结论。通过运用微扰理论，仅从对称性的角度（不进行能量计算）讨论分子构型畸变，并对ＸＹｎ型分子对称性进行推导，探讨ＸＹｎ型分子畸变类型。
By using the perturbation theory ,the author discusses the distortion of molecular configuration just from the angle of symmetry and studies the type of the distortion of XY n molecular in the deduction of its symmetry.
