Study of uncatalyzed and IrIII catalyzed oxidation of D-( +)dextrose by eerie ammonium sulphate - A kinetic study in acidic medium

Department of Chemistry, Govt. Nagarjun P.G. College, Raipur-492 010, Chhattisgarh, India Department of Chemistry, Disha Institute of Management and Technology, Raipur-492 010, Chhattisgarh, India E-mail : sonalchoube@gmail.com Manuscript received 29 April 2010, revised 17 October 2011, accepted 09 November 2011 The kinetics of uncatalysed and catalysed oxidation of D-( +)dextrose by cerium(IV) has been studied in acidic medium in the temperature range 303-338 K. The reaction has been found to be first order with respect to [D-( + )dextrose] in both uncatalysed and catalysed reactions. The rates follow first order kinetics in [IrIII] catalysed oxidation reaction. The effect of [HS04-] has also been observed. The increase in ionic strength of the medium decreases the rate of uncatalysed reaction while increases catalysed reaction. The 1 : 2 stoichiometry is observed in the oxidation. From the effect of temperature on the reaction rate, the Arrhenius and activation parameters have been calculated. A suitable mechanism has been proposed and a rate law explaining the experimental results is derived