Kinetics of the metal-ion oxidation of phenylphosphonous acid in solution. Part I. Oxidation by vanadium(V)

Abstract

Kinetics of the oxidation of phenylphosphonous acid by vanadium(V) over a temperature range of 40–55 °C have been studied. The rate of oxidation increases with the increase in the concentration of hydrogen ions. The effect of acetic acid on the rate indicated the reaction to be of ion–dipole type. The thermodynamic parameters have been evaluated. The kinetic evidence does not indicate the formation of an intermediate compound between the undissociated substrate and the reactive species of vanadium(V). Possible reaction steps in two different mineral acids are suggested.