The photostimulated reactions of p-nitrobenzophenone and p-nitrobenzonitrile with a variety of nucleophiles have been investigated. Displacement of the nitro group is observed in all cases. The rates of the reactions were measured by FT-IR. The rates were slowed by substances such as sulfur, air, Galvinoxyl and p-benzoquinone. In several cases rates of loss of starting material were monitored by quenching
研究了对硝基
二苯甲酮和
对硝基苯甲腈与各种亲核试剂的光刺激反应。在所有情况下均观察到硝基的置换。反应速率通过FT-IR测量。诸如
硫,空气,加尔维诺尔和
对苯醌等物质使速率降低。在几种情况下,通过淬灭反应混合物并分离产物和起始原料来监测起始原料的损失速率。这些反应在
抑制剂存在下也显示出对其速率的抑制。这些结果表明反应是连锁过程。结论是,底物被转化成它们相应的自由基阴离子,然后它们在双分子置换反应中与亲核试剂反应。替代机制,