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OXIDATION OF COBALT (III) COMPLEXES OF α-HYDROXY ACIDS BY PYRIDINIUM DICHROMATE IN THE PRESENCE OF SURFACTANTS

B. MOHAMMED NAWAZ*, K. SUBRAMANI and K.ANANDARATCHAGAN

The kinetics of one electron transfer route seems to be unavailable for Pyridinium dichromate (PDC) with cobalt (III) bound and unbound complexes of α-hydroxy acid in surfactant medium. PDC oxidizes cobalt (III) bound and unbound α-hydroxy acids. It rules out the synchronous C-C bond fission and electron transfer to cobalt (III) centre. Oxidation of above complexes increases with increase of temperature. With increase in surfactant concentration an increase in the rate is observed. The added CTAB enhances the rate of oxidation of a reaction much more than NaLS. Similar trends has been observed in lactato and glycolato Co (III) complexes.