Reaction Kinetics and Catalysis Letters

, Volume 54, Issue 1, pp 173–180 | Cite as

Kinetics and mechanism of oxidation of substituted benzaldehydes by quinolinium fluorochromate

  • A. Pandurangan
  • V. Murugesan
Article

Abstract

The kinetics of oxidation of a number of meta- and para-substituted benzaldehydes by quinolinium fluorochromate, QFC has been studied in aqueous acetic acid medium in the presence of acid. The products of oxidation are the corresponding benzoic acids. The reaction is first order each in substrate, QFC and HClO4. Electron-withdrawing substituents increase the rate, while electron-releasing substituents decrease it and the rate data obey Hammett's relationship. The reaction constant ϱ for the oxidation has a value of 1.16±0.07 at 30°C. The activation enthalpies and entropies are calculated and the possible mechanism for oxidation is discussed.

Keywords

Oxidation Entropy Enthalpy Acetic Acid Catalysis 

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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • A. Pandurangan
    • 1
  • V. Murugesan
    • 1
  1. 1.Department of ChemistryAnna UniversityMadrasIndia

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