Kinetics of C–H bond and alkene oxidation by trans-dioxoruthenium(<scp>VI</scp>) porphyrins
作者:Clare Ho、Wa-Hung Leung、Chi-Ming Che
DOI:10.1039/dt9910002933
日期:——
characterized, and the kinetics and mechanism of oxidation of the C–H bond and alkenes investigated. The complexes were selective towards tertiary C–H bonds in saturated alkanes but were almost inactive towards secondary C–H bonds. However, they were reactive towards aromatic hydrocarbons and the second-order rate constants (k2) for the oxidation of ethylbenzene and cumene by [Ru(tpp)O2](tpp = 5, 10, 15, 20-te
A.合成并表征了一系列[Ru VI LO 2 ]配合物(H 2 L =对位取代的四苯基卟啉),并研究了C–H键和烯烃的氧化动力学和机理。该络合物对饱和烷烃中的C–H键具有选择性,但对C–H二级键几乎没有活性。但是,它们对芳烃有反应性,[Ru(tpp)O 2 ](tpp = 5,10,15,20-四苯基卟啉)氧化乙苯和枯烯的二级速率常数(k 2)为2.21。 ×10 –4和3.16×10 –4 dm 3 mol –1s –1分别。发现环己烯被[Ru(tpp)O 2 ]烯丙基氧化的动力学同位素效应(K H / K D)为11.7 。CH 2 Cl 2 -MeOH混合物中烯烃氧化的主要有机产物是环氧化物,[Ru(tpp)O 2 ]得到的单体产物为[Ru IV(tpp)O]·EtOH。或[Ru IV(tpp)(OH)2 ·] EtOH。与[Ru VI(oep)O 2 ](oep = 2,3,7,8