共轭二烯烃亲电加成反应中动力学控制产物的探讨

Reflection on the Kinetically-Controlled Products distribution of electrophilic Addition on Conjugated Diene

共轭二烯烃在亲电加成反应中 ,1 ,2 -加成产物和 1 ,4-加成产物的分布受动力学控制和热力学控制影响 ,1 ,2 -加成产物之所以受动力学控制是因为活性中间体———碳正离子中C2

In reactlon of the electrophilic addition of conjugated diene,the products' distribrtion of 1,2-addition and 1,4-addition predominated by kinetically controlled and balance controlled respectively.The reason to lead to the 1,2-addition products predominated by kinetically-controlled is that the active intermediate——Carbonation 2C has higher positive electicity density than that of 4C