The selectivity and active-energy of endo/exo for the reaction were investigated by using the HF/6-31+G and B3LYP /6-31+G level of theory.

• 在HF/6-31+G*和B3LYP/6-31+G*方法水平上；考察了反应的endo/exo(内型/外型)选择性、活化能等.