Formation of hydrotrioxides during ozonation of hydrocarbons on silica gel. Decomposition of hydrotrioxides
作者:Elena V. Avzyanova、Qadir K. Timerghazin、Alexey F. Khalizov、Sergey L. Khursan、Leonid V. Spirikhin、Valery V. Shereshovets
DOI:10.1002/(sici)1099-1395(200002)13:2<87::aid-poc210>3.0.co;2-d
日期:2000.2
Hydrotrioxides (HT), ROOOH, from isopentane, 1,4-dimethylcyclohexane, 1,3-dimethylcyclohexane, decalin and triphenylmethane were synthesized for the first time by low-temperature ozonation of the corresponding hydrocarbons on a silica surface. Thermal decomposition of hydrotrioxides is accompanied by the formation of radicals and by infrared and visible chemiluminescence (CL). In solution the HTs form
首次在二氧化硅表面通过相应烃类的低温臭氧化合成了异戊烷、1,4-二甲基环己烷、1,3-二甲基环己烷、萘烷和三苯甲烷的三氧化氢 (HT)、ROOOH。氢三氧化物的热分解伴随着自由基的形成以及红外和可见化学发光 (CL)。在溶液中,HT 形成自缔合并与溶剂(丙酮)发生可逆反应,产生 Bayer-Villiger 型中间体(不对称二烷基三氧化物)。这些反应导致 HT 分解动力学的复杂特征,如监测 CL 强度对时间的依赖性所证明的那样。HT 热分解的活化参数显示出补偿效应(logA vs EA),它很好地描述了有机三氧化物均裂的可用实验和理论数据。版权所有 © 2000 John Wiley & Sons, Ltd.