Kinetics and Mechanism of Oxidation of Glutamic Acid by Dihydroxydipriodatoargentate(Ⅲ) with Spectro-photometry in Alkaline Medium

Abstract

Abstract: In recent years, the study of the highest oxidation state of transition metals has intrigued many researchers, which can provide new and valuable information in some fields. The kinetics of oxidation of glutamic acid by DPA in alkaline medium was studied with spectrophotometry in the temperature range of 250 ℃. The reaction was found to be pseudo-first order with respect to DPA and to be the first order to glutamic acid. At a low concentration of OH^-, the reaction rate decreased with increasing the concentration of OH^-, but when increased to an enough extent, the reaction rate increased with increasing the concentration of OH^-. The rate decreased with increasing the concentration of IO₄ and increased with the increase of μ and no free radical was detected. We bring forward the mechanism of the reaction, which can be used to explain all the experimental results. The activation parameters of the rate-determining step and the equilibrium constant were calculated at 298.2 K.

Key words: Dihydroxydipriodatoargentate(Ⅲ), Glutamic acid, Redox reaction, Kinetics and mechanism

CLC Number:

O646.54

TrendMD:

SHAN Jin-Huan, HUO Shu-Ying, SHEN Shi-Gang, SUN Han-Wen, WANG An-Zhou. Kinetics and Mechanism of Oxidation of Glutamic Acid by Dihydroxydipriodatoargentate(Ⅲ) with Spectro-photometry in Alkaline Medium[J]. Chem. J. Chinese Universities, 2005, 26(4): 706.

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Kinetics and Mechanism of Oxidation of Glutamic Acid by Dihydroxydipriodatoargentate(Ⅲ) with Spectro-photometry in Alkaline Medium

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