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Mechanism of oxidation of reducing sugars by osmium tetraoxide in alkaline medium by the stopped-flow technique

✍ Scribed by Hari Shankar Singh; Bihari Singh; Anil Kumar Singh

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 473 KB
Volume: 211
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(91)80094-4

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✦ Synopsis

The kinetics of reduction of osmium tetraoxide by L-sorbose, I,-galactose. D-xylose, and L-arabinose in aqueous alkaline medium exhibit a pseudo-unimolecular rate with respect to [osmium tetraoxide]. First-order kinetics were observed with respect to both [sugar] and [OH-] at their lower concentrations, but tends towards zero order with respect to each at higher concentrations. The experimental results suggest formation of an activated complex between enediol and osmium tetraoxide which slowly decomposes into OS(W) species and intermediate products. The reaction products were identified. and results were also confirmed by statistical regression-analysis data.

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