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近年来,国内教科书中先后介绍过同共轭效应(homoconjugation)[1、2]。本文试讨论同共轭效应的概念、类型、特征和影响同共轭效应的因素。讨论中,我们主要以邻近基团的C=C键的π键、C—C键和C—H键的电子对或原子的未共同电子对离域到中心碳原子空p轨道的同共轭效应为例说明。其目的是使读者对同共轭效应有一个印象,以便有助于分析某些有机反应活性中间体,反应机理和予测产物的可能结构。
In recent years, domestic textbooks have introduced homoconjugation [1,2]. This article examines the concept, types, characteristics, and effects of conjugate effects with the same conjugate effects. In the discussion, we mainly consider the conjugate of delocalization to the empty p-orbit of the central carbon atom by the electron pair or the unidentical electron pair of the C-C bond and C-H bond of the C = C bond of a neighboring group Effect as an example. The intent is to give the reader an impression of the same conjugation effect to help analyze some of the organic reactivity intermediates, reaction mechanisms, and possible structures for the products to be predicted.