卤代烃亲核取代和消除反应影响因素教学思考

Teaching Reflection of Factors Affecting the Nucleophilic Substitution Reactions and Elimination Reactions of Alkyl Halides

卤代烃可以发生亲核取代反应、消除反应、与金属反应及还原反应,其中学生在学习亲核取代反应及影响因素、消除反应及影响因素,以及判断反应为取代反应还是消除反应时,感觉知识很多,容易混淆在一起,为了让学生学习起来更容易理解并记住,能快速判断出反应的类型,为此,我们对该部分知识采用了探究式教学,先强调重要基本概念,再对影响因素进行了对比归纳,在教学中取得了较好的教学效果。

Alkyl Halides occurred nucleophilic substitution reactions, elimination reactions, organometallic com- pounds and reduction reactions. The students were easily confused in learning nucleophilic substitution reactions and af- fecting factors, eliminate reactions and affecting factors, and judging reaction of substitution reactions or elimination reac- tion. In order to learn, understand and remember easily, and to quickly determine the type of the reaction, through some knowledge was organized to exploring, the important basic concepts were emphasized, and impact actors were compared and induced, good teaching results were achieved.