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Vol. 29 No. 7 (2017): Vol 29 Issue 7

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Kinetics and Thermodynamics of Oxidation of Some para-Substituted 4-Oxo-4-phenyl Butanoic Acids by Tripropylammonium Fluorochromate in Aqueous Acetic Acid Medium

https://doi.org/10.14233/ajchem.2017.20625
A. Yogananth
Research and Development Centre, Bharathiar University, Coimbatore-641 046, India
Basim H. Asghar
Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, P.O. Box: 9569, Makkah, Saudi Arabia
S. Sheik Mansoor
Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam-632 509, India

Corresponding Author(s) : S. Sheik Mansoor

smansoors2000@yahoo.co.in

Asian Journal of Chemistry, Vol. 29 No. 7 (2017): Vol 29 Issue 7

Abstract

The kinetics of oxidation of 4-oxo-4-phenyl butanoic acid (4-oxo acid), p-methoxy (p-OCH3), p-ethoxy (p-OC2H5), p-methyl (p-CH3), p-chloro (p-Cl), p-bromo (p-Br) and p-acetyl (p-COCH3) 4-oxo acids by tripropylammonium fluorochromate (TriPAFC) in aqueous acetic acid medium in the presence of perchloric acid have been described. The reaction is first order with respect to 4-oxo acid, TriPAFC and perchloric acid. The order of reactivity among the studied 4-oxoacids is: p-OCH3 > p-OC2H5 > p-CH3 > p-H > p-Cl > p-Br > p-COCH3. The effect of changes on the electronic nature of the substrate reveals that there is a development of positive charge in the transition state. The activation parameters have been computed from Arrhenius and Eyring plots. Based on the kinetic results, a suitable mechanism has been proposed.

Keywords

Tripropylammonium fluorochromate 4-Oxo acid Thermodynamic parameters Kinetics
Yogananth, A., Asghar, B. H., & Mansoor, S. S. (2017). Kinetics and Thermodynamics of Oxidation of Some para-Substituted 4-Oxo-4-phenyl Butanoic Acids by Tripropylammonium Fluorochromate in Aqueous Acetic Acid Medium. Asian Journal of Chemistry, 29(7), 1617–1621. https://doi.org/10.14233/ajchem.2017.20625
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