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首页> 外文期刊>European Chemical Bulletin >KINETICS AND MECHANISM OF OXIDATION OF SOME THIOACIDS BY MORPHOLINIUM FLUOROCHROMATE
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KINETICS AND MECHANISM OF OXIDATION OF SOME THIOACIDS BY MORPHOLINIUM FLUOROCHROMATE

机译：氟铬酸铵氧化某些硫辛酸的动力学和机理

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摘要

Oxidation of thioglycollic, thiolactic and thiomalic acids by morpholinium fluorochromate (MFC) in dimethylsulphoxide (DMSO) leads to the formation of disulphide dimmers. The reaction is first order in MFC. Michaelies-Menten type of kinetics is observed with respect to the thioacids. Reaction is failed to induce the polymerisation of acrylonitrile. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence has taking the form k obs = a + b [H + ]. The oxidation of thiolactic acid has been studied in nineteen different organic solvents. The solvent effect has been analysed by using Kamlet’s and Swain’s multiparametric equations. A mechanism involving the formation of a thioester and its decomposition in slow step has been proposed.
机译：在二甲基亚砜（DMSO）中用吗啉鎓氟铬酸盐（MFC）氧化巯基乙酸，巯基乳酸和巯基苹果酸会导致二硫化物二聚体的形成。该反应在MFC中是一阶的。就硫代酸而言，观察到了Michaelies-Menten动力学。反应失败，导致丙烯腈聚合。该反应由氢离子催化。氢离子依赖性的形式为k obs = a + b [H +]。已经在十九种不同的有机溶剂中研究了巯基乳酸的氧化。通过使用Kamlet和Swain的多参数方程分析了溶剂效应。已经提出了涉及硫酯的形成及其在缓慢步骤中分解的机理。

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