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Title: Kinetics and mechanism of oxidation of -glucose by chromium(VI) in perchloric acid
Authors: Khan, Zaheer
Issue Date: May-2000
Publisher: NISCAIR-CSIR, India
Abstract: The oxidation of -glucose with Cr(VI) in aqueous perchloric acid proceeds via formation of a 1:1 complex which is considered to be chromium (VI) bonded to anomeric-OH group. The complex is formed within the time of mixing and remains stable for ≥ 24h in the absence of perchloric acid. The reaction products are -1,4-glucolactone and Cr(III). Formation of CO2 has not been observed during the course of reaction under the experimental kinetic conditions. The reaction rate increases with [HClO4] and no acid-independent path has been observed. Manganese(II) inhibits the reaction rate and the order is found to be zero in [manganese(II)]. The kinetics of electron-transfer reactions to yield Cr(III) have been investigated spectrophotometrically and, on the basis of experimental data, mechanisms are presented and discussed .
Page(s): 522-527
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.39A(05) [May 2000]

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