Kinetics and Mechanism of Oxidation of 3-Amino-1-propanol by Diperiodatocuprate(III) in Alkaline Medium

Abstract

The kinetics of oxidation of 3-amino-1-propanol (3-AP) by diperiodatocuprate(III) (DPC) in aqueous alkaline medium have been studied by spectrophotometry in the temperature range 298.2 K–313.2 K. The reaction was found to be pseudo-first order with respect to DPC and 1 < nap < 2 to 3-AP. It was found that under pseudo-first order conditions ([3-AP] 0 [DPC]0), the observed rate constant kobschanged differently under different concentration of [OH −]. At low [OH−], kobsdecreased with increase in [OH−], but at higher [OH−], kobs increase with increase in [OH −], and periodate had a retarding effect on the reaction rate. There is a weak negative salt effect. The main products were identified by spot tests. Based on the experimental results, a probable reaction mechanism of oxidation is proposed. The rate equation derived from the mechanism can explain all the experimental phenomena. The activation parameters, along with the rate constants of the rate-determining step, were determined.