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  • Chem Sci Trans., 2015, 4(2),  pp 523-533  

    DOI:10.7598/cst2015.994

    Research Article

    Studies on the Kinetics of Benzimidazolium Fluorochromate Oxidation of Pyridine-2-aldehyde in Aqueous Acetic Acid Medium

  • V SALEEM MALIK1, I VANNAMUTHU1,2, S SYED SHAFI3 and S SHEIK MANSOOR1*
  • 1Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam - 632 509, Tamil Nadu, India
    2Department of Chemistry, Periyar Government Arts College, Cuddalore - 607 001, Tamil Nadu, India
    3Department of Chemistry, Thiruvalluvar University, Serkadu, Vellore - 632 106, Tamil Nadu, India
  • Abstract

    The oxidation of pyridine-2-aldehyde (2-PyA) by benzimidazolium fluorochromate (BIFC) has been studied in aqueous acetic acid medium. The oxidation leads to the formation of the pyridine-2-carboxylic acid. The reaction is first order with respect to [BIFC], [2-PyA] and [H+] and the reaction is catalyzed by hydrogen ions. The reaction mixture failed to induce the polymerization of added acrylonitrile. The reaction has been studied in different percentage of acetic acid-water mixture. The decrease in dielectric constant of the medium increases the rate of the reaction or low dielectric constant of the medium favours the reactivity. A suitable mechanism has been proposed.

    Keywords

    Pyridine-2-aldehyde, Benzimidazolium fluorochromate, Oxidation, Kinetics

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