立体电子效应
立体电子效应，重要理论有机化学概念之一。立体电子效应是综合了立体效应和电子效应的结果，但不是简单的两种效应加合的结果。由于共价键具有方向性，即具有特定的空间取向，这导致了电子效应对分子不同部位的影响存在差异。这就是立体电子效应最根本的立足点。
立体电子效应可以解释很多其他效应解释不了的现象。比如二氯甲烷的惰性问题，内酯比酯活泼的问题，环醚比醚活泼的问题等等。下面举例说明立体电子效应的应用和意义。 立体电子效应这个术语是E.J.Corey于60年代发明的。
Stereoelectronic effect
中文百科
英语百科
Stereoelectronic effect 立体电子效应
The stereoelectronic effect is the effect on molecular structures, physical properties and reactivities due to the molecules' electronic structures, in particular the interaction between atomic and/or molecular orbitals. Typical stereoelectronic effects with specific orbital overlaps generally lead to a specific molecular conformation or energy differentiation among various transition states that would lead to a particular reaction selectivity.
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