The title reaction was investigated in aqueous alkaline medium. A first order dependence in diperiodatonickelate (IV) (DPN) and an apparent fractional order in both vanillin and alkali were obtained. Periodate has a retarding effect on the reaction. The effect of added products and the ionic strength of the reaction medium have no significant effect on the reaction rate. A decrease in the dielectric constant of the medium decreases the rate of reaction. Effects of temperature on the rate of reaction were studied. A mechanism based on experimental results was proposed, and constants involved in the mechanism were evaluated. A good agreement between the observed and calculated rate constants at different experimental conditions was obtained.
Oxidation; Vanillin, Kinetics, DPN
KATHARI, CHANDRASHEKHAR; POL, PANDURANG; and NANDIBEWOOR, SHARANAPPA (2002) "The Kinetics and Mechanism of Oxidation of Vanillin by Diperiodatonickelate(IV) in Aqueous Alkaline Medium," Turkish Journal of Chemistry: Vol. 26: No. 2, Article 11. Available at: https://journals.tubitak.gov.tr/chem/vol26/iss2/11