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  • Chem Sci Trans., 2015, 4(2),  pp 559-569  

    DOI:10.7598/cst2015.1023

    Research Article

    Organic Catalysis in Oxidation of Isopropyl Alcohol by Pyridinium Flourochromate - A Kinetic and Mechanistic Study

  • KHUBI LAL REGAR and B. L. HIRAN
  • Chemical Kinetics and Polymer Research Laboratory, Department of Chemistry, University College of Science, Mohan Lal Sukhadia University, Udaipur 313001, Rajasthan, India
  • Abstract

    The kinetics of co-oxidation of isopropyl alcohol with oxalic acid by pyridinium flourochromate in perchloric acid-water medium leads to the formation of acetone and carbon dioxide. The reaction is first order with respect to [PFC], [Oxalic acid] and [IPA] and second order with respect to [HClO4]. Michaelis–Menten type kinetics was observed with respect to oxalic acid. The rate of co-oxidation of IPA and oxalic acid is hundred times greater than the combined rate of addition of both compounds separately. Oxalic acid catalyzed oxidation of IPA. The reaction rates were determined at different temperatures (303, 308, 313, 318 and 323 K) and the activation parameters were calculated. The reaction does not induce polymerization of acrylonitrile, this suggests PFC act as two electron oxidant. Rate of reaction increases with decrease in dielectric constant. A suitable mechanism for the reaction was postulated.

    Keywords

    Kinetic study, Isopropyl alcohol, IPA, Oxalic acid, Pyridinium flourochromate, Michaelis–Menten plot

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