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实验室碘苯怎么制备要有具体过程
更新时间: 2020-07-02 00:00:00  

1、碘苯的制备过程应属于桑德麦尔反应,其主要先使苯胺重氮化、再置换制得;

2、首先向冷却的苯胺的盐酸溶液中缓慢滴加亚硝酸钠溶液,并用碘化钾淀粉试纸测定反应终点,使苯胺发生重氮化反应生成重氮盐PhN2Cl,然后加入碘化钾溶液,温热条件下使重氮基被碘取代并放出氮气,生成碘苯。反应后加入强碱使过量的亚硝酸盐水解,酸化,最后用水蒸汽蒸馏收集产物,即得到纯净的碘苯。

关键词: 实验室 怎么 制备 具体 过程

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