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叠氮/偶氮/重氮化合物 Azo/azo/diazo compounds： 叠氮化合物是一类含有三个氮相连结构的化合物，一般用RN3表示。叠氮化合物是电子传递系统的抑制剂，能与细胞色素形成配位化合物，阻止细胞色素氧化酶氧化型a3组分的还原作用。 偶氮化合物即AZO，偶氮基─N=N─与两个烃基相连接而生成的化合物，通式R─N=N─R′。偶氮基能吸收一定波长的可见光，是一个发色团。有些偶氮化合物可用作分析化学中的酸碱指示剂和金属指示剂。有些偶氮化合物加热时容易分解，释放出氮气，并产生自由基，如偶氮二异丁腈AIBN等：故可用作聚合反应的引发剂。 重氮化合物（Diazo）是一类由烷基与重氮基相连接而生成的有机化合物。一般指脂肪族重氮化合物，大多具爆炸性。重氮化合物中的重氮基有多个共振式，中间氮原子带有部分正电荷，两端的碳和氮原子带负电荷。α-重氮酮和α-重氮酯中的负电荷可以离域到羰基上去，因此比较稳定。
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