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Title: Kinetic and mechanistic study of Br(V) oxidation of glycolic acid catalysed by aquochlororuthenium(III) complex at different acid strengths: Evaluation of individual rate constants and thermodynamic parameters
Authors: Reddy, Ch Sanjeeva
Kumar, T Vijaya
Issue Date: Jan-1997
Publisher: NISCAIR-CSIR, India
Abstract: Oxidation of glycolic acid (GA) by bromate in the presence of perchloric acid at moderate and low concentrations is catalysed by aquochlororuthenium(lll) complex. The reactions at moderate and low acid strengths exhibit different kinetic behaviour on account of existence of catalyst in different forms. In moderate acid solutions, the mechanism proposed involves the oxidation of Ru(III) to Ru(V) by the oxidant which in turn forms a reversible complex with substrate in the ratio of 1:2. The decomposition of the complex thus formed, into products is the slow rate determining step. At lower [acid], the mechanism is visualised as the formation of reversible complex between GA and catalyst preceding the formation of an intermediate with the oxidant in a slow-step. The decomposition of the intermediate into products is assumed to be the fast step. The rate constants involved in all individual steps of the reactions are evaluated along with their activation parameters and discussed.
Page(s): 57-62
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.36A(01) [January 1997]

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