自从价键理论及分子轨道理论建立以来,化学键的形成,结构及性质得到了本质性的认识。但由于有机反应的复杂性,有关有机反应性及控制因素的影响却了解甚少,对实验现象的解释还存在着许多矛盾。急需一种易被大家接受的简单的定性理论来解释一些新现象和预测反应结果,前线轨道理论虽然很成功,但由于应用的局限性并且不能给出反应过程的变 Since the theory of bond theory and molecular orbital theory was established, the formation, structure and properties of chemical bonds have been essentially recognized. However, due to the complexity of organic reactions, little is known about the influence of organic reactivity and control factors. There are still many contradictions in the interpretation of experimental phenomena. There is an urgent need for a simple qualitative theory that is easily accepted by everyone to explain some new phenomena and to predict the response. Although the theory of frontier orbital is very successful, due to the limitations of the application and the inability to give a response