Kinetics and Mechanism of Oxidation of Sodium Sulfanilate by Dihydroxydiperiodat Onickelate(IV) in Aqueous Medium

2011 
The kinetics of oxidation of sodium sulfanilate by dihydroxydiperiodatonickelate?IV?(DPN) was studied spectrophotometrically in alkaline medium. The reaction rate showed first order dependence in oxidant and fractional order in reductant. The corresponding reaction mechanism involving a pre-equilibrium of adduct formation between the complex and reductant was proposed. The rate equations derived from mechanism can explain all experimental observations. The activation parameters along with rate constants of the rate-determining step were calculated.
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