The kinetics of oxidation of methyl phenyl sulphide (MPS) by imidazolium fluorochromate (IFC) in acetonitrile - water (1:1) mixture at 303 K in presence of perchloric acid was followed spectrophotometrically at 360 nm. The reaction was carried out under pseudo first order conditions ([MPS] >> [IFC]). The reaction was first order each in MPS and IFC and fractional order in H+. Also it has been found that the reaction was not affected by ionic strength of medium changed by altering the concentration of the sodium perchlorate. However increase in the acetonitrile content of the medium increases the rate of the reaction. These observations were well analyzed in favour of a SN2 type of mechanism.
Sulphide, IFC, Oxidation, Spectrophotometry