Kinetics and Mechanistic Study of Phosphotungstic Acid Catalyzed Oxidation of 2-Phenylethanol by N-Bromophthalimide

By Jagdish V. Bharad, Balaji R. Madje and Milind B. Ubale




Abstract

Kinetic investigations in Keggin-type phosphotungstic acid catalyzed oxidation of 2-Phenylethanol N-Bromophthalimide (NBP) in aqueous acetic acid medium in presence of mercuric (II) acetate as a scavenger have been studied. Oxidation kinetics of 2-Phenylethanol by NBP in presence of Phosphotungstic acid (PTA) shows a first order dependence on NBP and fractional order on 2-Phenylethanol and PTA.   The variation of ionic strength, Hg(OAC)2 , H+ and phthalimide (reaction product) have insignificant effect on reaction rate. Activation parameters for the reaction have been evaluated from Arrhenius plot by studying the reaction at different temperature.  The rate law has been derived on the basis of obtained data.

 

Key Words: Kinetics, 2-Phenylethanol, N-Bromophthalimide, phosphotungstic acid

 

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