Kinetics and mechanism of oxidation of α-hydroxy acids by quinolinium dichromate

被引：0
|
作者：
Nalwaya, N [1 ]
Jain, R [1 ]
Hiran, BL [1 ]
机构：
[1] ML Sukhadia Univ, Chem Kinet Lab, Dept Chem, Coll Sci, Udaipur 313001, India
来源：
OXIDATION COMMUNICATIONS | 2003年 / 26卷 / 04期
关键词：
alpha-hydroxy acids; kinetics; oxidation; quinolinium dichromate;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Kinetics and mechanism of alpha-hydroxy acids (lactic and mandelic acid) by quinolinium dichromate(QDC) have been studied in aqueous-acetic acid medium. The reaction is first order each in [QDC], [alpha-hydroxy acid] and [HClO4]. The rate of reaction increases with decrease in solvent polarity. Various thermodynamic parameters have been evaluated. The reaction proceeds through formation of a cyclic chromic-ester between protonated quinolinium dichromate and alpha-hydroxy acid, followed by decomposition to aldehyde and CO2 by C-H bond fission.
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收藏
页码：561 / 566
页数：6
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