THE FAST FORMATION OF AN INTERMEDIATE IN THE CHROMIUM (VI) REDUCTION BY THIOLACTIC ACID - A KINETIC APPROACH BY MEANS OF THE STOPPED-FLOW TECHNIQUE

被引：0
|
作者：
Sabou, Dana-Maria [1 ]
机构：
[1] Univ Babes Bolyai, Fac Chem & Chem Engn, RO-400028 Cluj Napoca, Romania
来源：
STUDIA UNIVERSITATIS BABES-BOLYAI CHEMIA | 2014年 / 59卷 / 04期
关键词：
kinetics; thiolactic acid; chromium(VI); redox; stopped-flow; HEXAVALENT CHROMIUM; CARCINOGEN CHROMATE; GENOTOXICITY; COMPLEXES; THIOLS; CELLS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The reaction between thiolactic acid and Cr(VI) in aqueous acidic solution at 295 K is a quite fast multi-step process, beginning with the formation of a condensation species, in an equilibrium that involves both the main reactants and H+ ions. The kinetics of this first step was studied by means of the stopped-flow and spectrophotometrical techniques. Reaction orders of one were found for both the thiolactic acid (RSH) and Cr(VI), showing a 1:1 combination ratio of the two in the intermediate. A fractional order was found in the case of the hydrogen ion, consistent with two parallel pathways: one assisted and one not assisted by H+.
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页码：183 / 193
页数：11
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