Elimination to form a carbon–carbon double bond exocyclic to a cyclopropane ring is inhibited by factors which increase from 1.4 to 104.5 as the leaving group becomes poorer; strain induced in the transition structure can amount to some 50% of the enthalpy difference between strained and unstrained products.
消除形成
环丙烷环外碳碳双键的过程受到的抑制因子从 1.4 增加到 104.5,因为离去基团变得越来越差;过渡结构中产生的应变约占应变产物和非应变产物之间焓差的 50%。