Oxidation of ethylene glycol by quinolinium dichromate in aqueous perchloric acid medium - A kinetic and mechanistic study

被引：0
|
作者：
Rajeshwari, H. V. [1 ]
Nandibewoor, S. T. [1 ]
Chimatadar, S. A. [1 ]
机构：
[1] Karnatak Univ, PG Dept Studies Chem, Dharwad 580003, Karnataka, India
来源：
JOURNAL OF THE INDIAN CHEMICAL SOCIETY | 2009年 / 86卷 / 09期
关键词：
Perchloric acid; ethylene glycol; quinolinium dichromate; oxidation; ALCOHOLS; QDC; CHROMIUM(VI); OXIDANT; REAGENT; DIOLS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The oxidation of ethylene glycol by quinolinium dichromate has been studied spectrophotometrically in aqueous perchloric acid medium. The stiochiometry is 2 : 3 i.e., two moles of quinolinium dichromate requires three moles of ethylene glycol. The reaction is first order with respect to-quinolinium dichromate and ethylene glycol concentrations. Increase in perchloric acid concentration increases the reaction rate. The order with respect to acid concentration is nearly two. Added products do not have any significant effect on the rate of reaction. Increasing ionic strength and decreasing dielectric constant of the medium increases the rate. A possible mechanism is proposed and reaction constants involved have been determined. The activation parameters were determined with respect to slow step of mechanism.
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页码：936 / 941
页数：6
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