我们己用分子轨道法探讨了几种类型的周环反应,说明了反应过渡状态所遵循的芳香性规则。本文用分子轨道法探讨周环反应的普遍选择规律,说明它取决于反应过渡状态的芳香性。 We have used molecular orbital analysis to explore several types of pericyclic reactions, illustrating the aromatic rules followed by the transitional state of reaction. In this paper, molecular orbital method to explore the universal choice of the cycle of the law, indicating that it depends on the reaction of the transitional state of the aromatic.