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Kinetics and mechanism of benzoin oxidation using iron(III) in the presence of ferrozine or 2,2'-bipyridine in acidic medium

✍ Scribed by Khaldoun A. Al-Sou'od; Basem F. Ali; Rajab Abu-El-Halawa; Abd-Al-Hakeem H. Abu-Nawas

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 121 KB
Volume: 37
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.20092

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✦ Synopsis

Abstract

Kinetics and mechanism of oxidation of benzoin (H~2~B) by ferrozine (Fz) or 2,2'‐bipyridine (bipy) have been carried out in aqueous HNO~3~ medium. The rate shows first‐order dependence on [H~2~B] and [Fe^3+^] and inverse second‐order dependence on [H^+^]. The rate of reaction increased with increase in the ligand concentration. The increase in dielectric constant will increase the rate, while increase in [HNO~3~] decreased it. Substituent and temperature effects on the rates have been investigated. The rate laws derived are in excellent agreement with the experimental results. Plausible mechanisms are suggested. © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: 444–449, 2005

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