Kinetics and mechanism of the oxidation of borneol by Tetrakis (Pyridine) silver Dichromate
European Journal of Molecular & Clinical Medicine,
2020, Volume 7, Issue 10, Pages 3574-3582
AbstractThe kinetics of oxidation of secondary cyclic alcohol like borneol by Tetrakis Pyridine Silver (I) Dichromate (TPSD) as an oxidant in acidic nonaqueous medium leads to the formation of cyclic ketone like camphor. In this oxidation reaction Cr (VI) acts as two electron oxidizing agent. The reaction is found to be first order with respect to each [TPSD], [Borneol] and [TsOH]. The reaction mixture failed to induce the polymerization of added acrylonitrile. The reaction is catalysed by hydrogen ions. The oxidation reaction of borneol was studied in ten different organic solvents. The solvent effect was studied by using Kamlet’s and Swain’s multiparametric equations. Solvent effect shows the importance of the cation-solvating power of the solvent. The reaction has been carried out at four different temperature and the activation parameters were calculated. Negative ΔS# values indicate a structured transition state. A suitable reaction mechanism has been suggested. Keywords: Kinetics, Mechanism, Oxidation, Borneol, Dichromate.
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