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Paper Details

Kinetics and mechanism of phosphotungstic acid catalyzed oxidation of citric acid by N-chlorosaccharin

Sanjay K. Singh*1, Harjeet Gujral2, Raman Deep Kaur3, Monika Arora3, Gurpreet Kaur4 and H. D. Gupta1

Journal Title:Journal of Chemical, Biological and physical sciences

The kinetics of oxidation of citric acid (CA) with N-chlorosaccharin (NCSA) in the presence of phosphotungstic acid (PTA) has been measured at 293, 298, 303 and 308 K. The order with respect to NCSA was found to be unity while with CA and PTA was fractional. The effects of temperature, composition of solvent medium and concentration of added mineral acid on the rate of reaction were also studied. The mechanism for the catalysed oxidation is likely to proceed through the formation of a ternary complex between PTA, CA and NCSA which is being decomposed and gives product in slow rate-determining step.