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本文对NAD(P)H模型物BNAH同呫吨正离子反应的动力学进行了较为详尽的测定.同位素效应,自由基抑制剂对反应的影响以及对不同机理模式中各基元步骤的热力学趋动力的研究均表明,反应由决速的电子转移引发,随后通过快速的氢原子转移而形成产物动力学活化参数的分析指出,电子转移前反应底物间首先形成一个预配合平衡.本文还对BNAH还原9-苯基呫吨正离子和三苯甲烷正离子的机理进行了较合理的估测.
In this paper, the kinetics of the reaction of BNAH with xanthene in the NAD (P) H model has been investigated in detail.Isotopic effects, the effects of free radical inhibitors on the reaction, and the thermodynamic trends of the various elementary steps in different mechanism modes Dynamic studies all indicate that the reaction is initiated by a fast rate of electron transfer and subsequent analysis of product kinetic activation parameters by rapid hydrogen atom transfer indicates that a pre-complexing equilibrium is first formed between the reaction substrates prior to electron transfer. The mechanism of BNAH reduction of 9-phenylxanthene positive ions and triphenylmethane positive ions is more reasonable.