Oxidation of anilines by isoquinolinium bromochromate (IQBC) in aqueous acetic acid leads to the formation of corresponding azobenzenes. The reaction is first order with respect to both aniline and IQBC and is catalyzed by hydrogen ion. The rate of oxidation decreases with increasing dielectric constant of solvent, indicating the presence of an ion-dipole interaction. The rate of oxidation decreases with increase in concentration of KCl, possibly due to the formation of less reactive species by interaction of Cl^- and protonated IQBC. The specific rate of oxidizing species anilines reaction correlates with substituents constant affording a negative reaction constant. Hammett plot is found to be valid and the correlation between enthalpies and free energies of activation is reasonably linear with an isokinetic temperature of 401 K.

中文翻译：

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溴酸异喹啉鎓在乙酸水溶液中氧化苯胺和苯胺的动力学和机理

溴酸异喹啉鎓（IQBC）在乙酸水溶液中氧化苯胺导致形成相应的偶氮苯。该反应相对于苯胺和IQBC都是一级的，并且是通过氢离子催化的。氧化速率随溶剂介电常数的增加而降低，表明存在离子-偶极相互作用。氧化的速率与可能由于反应性较低的物质的形成被C的相互作用增加的KCl的浓度降低^-并质子化IQBC。氧化物种苯胺反应的比速率与取代基常数相关，其提供负反应常数。哈米特图被发现是有效的，并且焓和活化自由能之间的相关性在401 K等速动力学温度下是合理的线性关系。