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首页> 外文期刊>Journal of the Indian Chemical Society >Oxidation of aliphatic primary alcohols by morpholmium chlorochromate : A kinetic and mechanistic approach
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Oxidation of aliphatic primary alcohols by morpholmium chlorochromate : A kinetic and mechanistic approach

机译:氯铬酸吗啉氧化脂族伯醇的动力学和机理

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摘要

The oxidation of nine aliphatic primary alcohols by morpholinium chlorochromate (MCC) in dimethylsulf-oxide leads to the transformation of alcohols to the corresponding aldehydes. The reaction is first order with respect to both MCC and the alcohol both. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : k_(obs) = a + b[H~+]. The oxidation of [1,1-~2H2]ethanol (MeCD2OH) exhibits a substantial primary kinetic isotope effect. The reaction has been studied in nineteen different organic solvents. The solvent effect was analysed using Taft's and Swain's multiparametric equations. The rate of oxidation is susceptible to both polar and steric effects of the substituents. A suitable mechanism has been proposed.
机译:在二甲基亚砜中,氯铬酸吗啉鎓(MCC)将9种脂肪族伯醇氧化,导致醇转化为相应的醛。对于MCC和醇而言,反应都是一阶反应。该反应由氢离子催化。氢离子依赖性的形式为:k_(obs)= a + b [H〜+]。 [1,1-〜2H2]乙醇(MeCD2OH)的氧化显示出基本的一级动力学同位素效应。已经在十九种不同的有机溶剂中研究了该反应。使用塔夫脱(Taft)和斯文(Swain)多参数方程分析了溶剂效应。氧化速率易受取代基的极性和空间影响。已经提出了合适的机制。

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