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Kinetics and Mechanism of Oxidation of Chalcones by 1,3-Dichloro-5,5-dimethyl Hydantoin

https://doi.org/10.14233/ajchem.2015.17582
P. Tamil Selvi
Department of Chemistry, Sona College of Technology, Salem-636 005, India
K. Karunakaran
Department of Chemistry, Sona College of Technology, Salem-636 005, India

Corresponding Author(s) : K. Karunakaran

karunachemist@gmail.com

Asian Journal of Chemistry, Vol. 27 No. 5 (2015): Vol 27 Issue 5

Abstract

Mechanistic study on oxidation of chalcone by 1,3-dichloro-5,5-dimethyl hydantoin (DCDMH or DCH) in aqueous acetic acid medium have been carried out. The reaction follows a fractional order (0.63) with respect to substrate and first order with respect to the oxidant. Increase in percentage of acetic acid increased the rate of the reaction. The added H+ did not affect the reaction rate. The oxidation reaction fails to initiate polymerization with acrylonitrile and free radical mechanism is ruled out. The thermodynamic and activation parameters for the oxidation have been determined and discussed. Based on the observations a probable mechanism and rate law were proposed.

Keywords

Chalcone 1 3-Dichloro-5 5-Dimethylhydantoin Kinetics Oxidation
Tamil Selvi, P., & Karunakaran, K. (2015). Kinetics and Mechanism of Oxidation of Chalcones by 1,3-Dichloro-5,5-dimethyl Hydantoin. Asian Journal of Chemistry, 27(5), 1725–1728. https://doi.org/10.14233/ajchem.2015.17582
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