现代量子化学对共轭分子反应活性的估价,在轨道对称守恒原理出现之前有两种以π电子近似为基础的理论——“静态”理论(孤立分子近似)和过渡状态理论(定域理论)。静态理论是从孤立的分子出发,不考虑反应的历程,仅考虑该分子被反应试剂进攻前和开始进攻瞬 There are two theories based on π electron approximation before the advent of the principle of conservation of orbital symmetry - “static” theory (isolated molecular approximation) and transitional state theory (localized theory) . Static theory is based on isolated elements, regardless of the reaction process, only consider the molecular reaction reagents before attacking and starting instant