论文部分内容阅读
到目前为止,关于烯烃的加成机理,已基本上研究清楚。在没有光照和自由基引发剂的存在下,烯烃和加成试剂的反应是亲电的加成反应。烯烃的加成反应可用下式表示:式中R_1R_2C=CR_3R_4代表任意烯烃,R_1、R_2、R_3、R_4可以相同,也可以不同,既可代表烷基,也可代表氢原子或其他某些集团;X—Y代表加成试剂,X和Y可以相同(例如卤素)也可以不同(例如卤化氢)。反应机理可以直观地用下式表示:
Up to now, the mechanism of addition of olefins has been basically studied clearly. In the absence of light and free radical initiators, the reaction of the alkene with the addition reagent is an electrophilic addition reaction. The addition reaction of olefins can be represented by the following formula: wherein R_1R_2C = CR_3R_4 represents any alkene, and R_1, R_2, R_3 and R_4 may be the same or different and may represent an alkyl group or a hydrogen atom or some other group; X-Y represents an addition reagent, X and Y may be the same (eg, halogen) or may be different (eg, hydrogen halide). The reaction mechanism can be intuitively expressed as follows: