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Paper Details

Kinetics and mechanism of oxidation of some thioacids by imidazolium fluorochromate

Mamta Gillaa, A. Meenaa, A. Choudharya, M. Baghmarb, I.K Sharmab, L. Kotaic and Vinita Sharma*a

Journal Title:Journal of Chemical, Biological and physical sciences

Oxidation of thioglycollic, thiolactic and thiomalic acids by imidazolium fluorochromate (IFC) in dimethylsulphoxide (DMSO) leads to the formation of disulphide dimmers. The reaction is first order in IFC. Michaelies-Menten type of kinetics is observed with respect to the thioacids. Reaction is failed to induce the polymerisation of acrylonitrile. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence has taking the form kobs = a + b [H+]. The oxidation of thiolactic acid has been studied in nineteen different organic solvents. The solvent effect has been analysed by using Kamlets and Swains multiparametric equations. A mechanism involving the formation of a thioester and its decomposition in slow step has been proposed.