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Kinetics of rhodium(III)-catalysed oxidation of some cyclic alcohols by diperiodatocuprate (III) in aqueous alkaline medium

Ravi Chandar Maroju*, T.Ravi Prasad, K.Nagi Reddy

Rh(III) Chloride catalysed oxidation of some cyclic alcohols by diperiodatocuprate (III) (DPC) in aqueous alkaline medium has been studied spectrophotometrically at 414 nm. The order in [DPC] is zero and one each in [Rh(III)] and [alcohol]. The rate of oxidation was unaffected by variation in [OH-] and [salt]. Stoichiometric studies revealed that one mole of alcohol consumed two moles of DPC giving the corresponding carbonyl compound as the reaction product. It has been proposed that Rh(III) catalysis in the oxidation of cyclic alcohol is a direct reaction between Rh(III) and alcohol to give products via a complex formation and hydride ion abstraction by Rh(III).