The Kinetics of Tripropylammonium Fluorochromate Oxidation of Mandelic Acids

Abstract

<em>The oxidation of Mandelic Acid</em><em>s</em><em> (MA) </em><em>to the corresponding oxoacids with </em><em>tripropylammonium</em><em> fluorochromate (TriPAFC) </em><em>in aqueous acetic acid has been studied. The reaction is first order with respect to [</em><em>TriPAFC</em><em>], [MA] and [H⁺]. </em>The oxidation of α-deuteriomandelic <em>acid shows the presence of a primary kinetic isotope effect (k_H/k_D </em><em>= </em><em>5.54 at 303 K). </em><em>The reaction has been found to be catalyzed by H⁺ ions.</em><em> The various thermodynamic parameters for the oxidation have been reported and discussed along with the validity of the isokinetic relationship.</em><em> The Exner plot showed that all the selected mandelic acids are oxidized by the same mechanism.</em>