卤烷与 NaOH 在水与乙醇混合物中进行反应 , 指出哪些属于 S N 2 历程 , 哪些属于 S N 1 历程。 (1) 产物的构型完全转化 (2) 有重排产物 (3) 碱浓度增加 , 反应速度加快 (4) 叔卤烷反应速度大于卤烷 (5) 增加溶剂的含水量 , 反应速度明显加快 (6) 反应一步完成 , 不分阶段 (7) 试剂亲核性 , 反应速度愈快
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