Kinetics and Mechanism of the Oxidation of DL-Methionine by Tetrakis(Pyridine)silver Dichromate

被引：1
|
作者：
Patel, M. [1 ]
Mathur, L. [1 ]
Jha, K. [2 ]
Kothari, A. [1 ]
Shastri, I. [2 ]
Sharma, Pradeep K. [1 ]
机构：
[1] Jai Narain Vyas Univ, Dept Chem, Jodhpur 342005, Rajasthan, India
[2] RD Natl Coll, Dept Chem, Bombay 400050, Maharashtra, India
来源：
ASIAN JOURNAL OF CHEMISTRY | 2013年 / 25卷 / 05期
关键词：
Dichromate; Kinetics; Mechanism; Methionine; Oxidation; TETRAETHYLAMMONIUM CHLOROCHROMATE; PYRIDINIUM BROMOCHROMATE; REACTIVITY; ALPHA;
D O I：
10.14233/ajchem.2013.13887
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The oxidation of methionine by tetrakis(pyridine)silver dichromate in dimethyl sulphoxide leads to the formation of corresponding sulphoxide. The reaction is of first order with respect to tetrakis(pyridine)silver dichromate. Michaelis-Menten type kinetics was observed, with respect to methionine. The reaction is catalyzed by hydrogen ions. The hydrogen-ion dependence has the form: k(obs) = a,+ b [H+]. The oxidation of methionine was studied in 19 different organic solvents. The Solvent effect was analyzed by Kamlet's and Swain's multiparametric, equations. Solvent,effect indicated the importance of the cation-solvating power of the solvent A. suitable mechanism has also been postulated.
引用
收藏
页码：2779 / 2782
页数：4
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