电子效应分为诱导效应和共轭效应两种。所谓诱导效应是指在有机物分子中,由于电负性不同的原子或原子团的影响,使整个分子中成键电子云向某一方向移动,从而使分子发生极化的效应。所谓共轭效应是指由于形成共轭π键而引起的分子性质改变的效应,也称C效应。 Electronic effects are divided into induction and conjugation effects of two. The so-called inductive effect refers to the organic molecules, due to the electronegativity of different atoms or groups of atoms, so that the entire molecular bonding electron cloud to move in one direction, so that the molecular polarization effect. The so-called conjugate effect is due to the formation of the conjugated π bond caused by changes in the nature of the molecular effect, also known as C effect.