Manganese(III) Oxidation of Alanine in Aqueous Ethanoic Acid Medium: A Kinetic and Mechanistic Study

被引：0
|
作者：
Kumar, C. S. Chidan [2 ]
Chandraju, S. [3 ]
Gowda, Netkal M. Made [1 ]
机构：
[1] Western Illinois Univ, Dept Chem, Macomb, IL 61455 USA
[2] G Madegowda Inst Technol, Dept Chem, Mandya, Karnataka, India
[3] Univ Mysore, Sir M Visweswaraya Post Grad Ctr, Dept Studies Sugar Technol, Mandya, Karnataka, India
来源：
SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY | 2011年 / 41卷 / 10期
关键词：
alanine; kinetics; manganese(III); mechanism; oxidation; reduction; ALPHA-AMINO-ACIDS; ACETIC-ACID; SULFURIC-ACID; METHIONINE; CHEMISTRY; SULFATE; SERINE;
D O I：
10.1080/15533174.2011.609214
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A stock solution of manganese(III) acetate in aqueous acetic acid has been prepared using a standard electrochemical method. The nature of the oxidizing species present in manganese(III) solutions has been characterized by spectrophotometric and redox potential measurements. Kinetics of oxidation of DL-alanine (Ala) by manganese(III) in aqueous acetic acid solution at 313 K have been investigated. The experimental rate law is: rate = k'[Mn(III)](0.5)[Ala](0.9) [OAc-](y0.5)/[H+](0.5), where each species shows a fractional order. Effects of varying ionic strength, solvent composition, and the added ions such as fluoride, chloride, and perchlorate have been investigated. Activation parameters have been evaluated using Arrhenius and Eyring plots. A mechanism consistent with the observed kinetic data has been proposed and discussed. A suitable rate law has been derived based on the mechanism.
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页码：1331 / 1337
页数：7
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