Kinetics and Mechanism of Oxidation of iso-Propanolamine and iso-Butanolamine by Potassium ferrate

Abstract

The kinetics of oxidation of iso-propanolamine and iso-butanolamine by potassium ferrate(VI) in alkaline liquids at a constant ionic strength has been studied spectrophotometrically in the temperature range of 288.2-308.2 K. The reaction shows first order dependence on potassium ferrate(VI) and each reductant with respect to [OH^–], the reaction is negative fraction order. The observed rate constant (k_obs) decreases with the increase of [OH^–]. A plausible mechanism is proposed and the rate equations derived from the mechanism can explain all the experimental results. The rate constants of the rate-determining step and the activation parameters are calculated.