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能极相关理论是阐明周环反应三大基本理论之一,也是分子轨道对称守恒原理在周环反应中的直接应用。在用能级相关理论分析周环反应进行的可能性时,先得画出相关图,然后根据对相关图的分析做出结论。在这过程中,一般读者思想上总存在着这样两个问题:1.为什么画相关图时要遵守不相交原则？2.在相关图中为什么当反应物的分子轨道以对称守恒的方式转化成产物的分子轨道时,一些基原子轨道会消失。
Extremely relevant theory is to clarify one of the three basic theories of pericyclic reaction, and it is also a direct application of the conservation principle of molecular orbital symmetry in the pericyclic reaction. When using energy level correlation theory to analyze the possibility of the pericyclic reaction, we first draw the correlation graph and then make a conclusion based on the analysis of the correlation graph. In this process, there are always two problems with the general reader’s thinking: 1. Why do we observe the principle of disjointness when drawing the relevant figures? 2. Why some of the atomic orbital atoms disappear when the molecular orbit of the reactant is converted to the molecular orbit of the product in a symmetric and conservative manner in the relevant graph.