现行高中化学人教版教材中有关乙烯加成反应的研究中,课本上明确说的是乙烯与溴的四氯化碳溶液的加成反应,而以前旧教材和平时学习的习题中却说的是乙烯与溴的水溶液的加成反应,并且现象相同。一目了然,两种不同的反应环境,为啥结果一样?经研究实际上乙烯与溴的加成反应虽然可以不要催化剂,但必须是在极性环境下。 The current high school chemistry PEP teaching materials on ethylene adduct reaction, the text clearly states that ethylene and bromine carbon tetrachloride solution of the addition reaction, while the old textbooks and peacetime learning exercise is said to be Addition reaction of ethylene and bromine aqueous solution, and the phenomenon is the same. At a glance, the two different reaction environment, so why the same? After the study of the reaction of ethylene and bromine although the catalyst may not need, but must be in a polar environment.