Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/18038
Title: Role of Ru(III) as an inhibitor in oxidation of lactose by [Cu(bipy)2]2+ in alkaline medium: Spectrophotometric and kinetic studies
Authors: Singh, Ashok Kumar
Singh, Manjula
Srivastava, Jaya
Rahmani, Shahla
Keywords: Kinetics;Reaction mechanisms;Oxidations;Copper-bipyridyl complex;Ruthenium;Lactose
Issue Date: 13-May-2013
Abstract: Kinetics of oxidation of lactose by [Cu(bipy)2]2+ in alkaline medium using Ru(III) as an inhibitor has been studied spectrophotometrically at 40 °C. The studies show that the rate of the reaction is zero order with respect to [Cu(bipy)2]2+ and first order with respect to [lactose]. The order of reaction is found to be two at low concentrations of OH (from 1.48×105 to 3.47×105 M) and less than two at its high concentrations (from 4.27×105 to 6.31×105 M). There is a substantial decrease in the pseudo-zero order rate constant with increase in the concentration of Ru(III) chloride, indicating the role of Ru(III) chloride as an inhibitor. Decrease in the rate with increase in dielectric constant of the medium is observed, while ionic strength of the medium and bipyridyl concentration has no influence on the rate. Based on kinetic data and spectrophotometric evidences, a suitable mechanism is proposed for the studied reaction.
Page(s): 599-607
URI: http://hdl.handle.net/123456789/18038
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.52A(05) [May 2013]

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