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Title: Oxidation kinetics of arylthioureas by cetyltrimethylammonium dichromate
Authors: Sahoo, Prangya Rani
Sahu, Sandhyamayee
Patel, Sabita
Mishra, B K
Keywords: Kinetics;Reaction mechanisms;Oxidations;Thioureas;Arylthioureas;Solvent effects
Issue Date: Nov-2010
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.9 C07B33/00
Abstract: Arylthioureas, which are toxic, on oxidation by cetyltrimethylammonium dichromate in acetic acid undergo desulphurization to the corresponding non-toxic arylureas. The mechanism of the oxidation reaction has been studied spectrophotometrically. The rate of reaction is found to be dependent on [CTADC], [phenylthiourea], [acid], [surfactant], polarity of the solvents and reaction temperature. The reaction is fractional order with respect to [substrate] and is catalyzed by acid. With increase in [CTADC], the rate constant decreases. The structure of the substituents has no significant effect on the rate constant. On the basis of various observations, a mechanism has been proposed for the oxidation reaction.
Page(s): 1483-1487
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.49A(11) [November 2010]

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