电环化和环加成反应规律初探

Preliminary Exploration to the Rules of Electric Cyclization and Cycloaddition

采用前线轨道理论解释分子轨道对称守恒原理,突出前线轨道对称性,找出了前线轨道对称性规律,并根据前线轨道对称性判别反应中分子轨道的旋转方式,从而确定立体化学;无论是电环化还是环加成反应,其反应物分子轨道对称性具有相同规律,据此规律可轻松解决反应的立体化学问题。

The front orbital theory is applied to explain the molecular orbital symmetry conservation principle,and to highlight front orbital symmetry,find out the rule of the front orbital symmetry. According to the front orbital symmetry,the direction the rotating way of the molecular orbit during the reaction is judged in order to determine the stereochemistry chemistry. Both electric cyclization and cycloaddition work on the same rule of molecular orbital symmetry. According to this rule,the stereochemistry of the reaction can easily solved.