Abstrait

Kinetics and mechanismof oxidation of diethyleneglycol by N-chlorosaccharin in cetyltrimethylammonium bromide catalyzed system

Vandana Sharma*, K.V.Sharma, V.W.Bhagwat

The kinetics and mechanism of Cetyltrimethylammonium bromide catalyzed oxidation of Diethylene glycol [2,2'-oxydiethanol] by Nchlorosaccharin in aqueous acetic acid medium in presence of perchloric acid have been investigated at 318-338K temperature range. The reaction has first order dependence on N-chlorosaccharin concentration. The reaction rate follows fractional order kinetics with respect to[Diethylene glycol] with excess concentration of other reactants. The micelle effect due to Cetyltrimethylammonium bromide- a cationic surfactant has been studied. The change in ionic strength shows negligible salt effect. The dielectric effect is found to be positive. Addition of one of the product saccharin retards the reaction rate. Activation parameters are calculated from the Arrhenious plot. A possible mechanism consistent with the experimental results has been proposed.