Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (10): 947-949.doi: 10.3866/PKU.WHXB19941017

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Kinetics and Meckanism of Oxidation of Ethanolamine by Diperiodatocuprate(III)Ion in Alkaline Medium

Shan Jin-Huan, Liu Tie-Ying   

  1. Department of Chemistry,Hebei University,Baoding 071002
  • Received:1993-05-31 Revised:1993-10-12 Published:1994-10-15
  • Contact: Shan Jin-Huan

Abstract:

The kinetics of oxidation of ethanolamine by potassium diperiodatocupate (Ⅲ) was studied spectrophotometrically in alkaline medium at 293-2-303.2K. The reaction rate showed first order dependance on Cu(Ⅲ) and positive fractional order dependance on ethanolamine. It was found that the pesudo first-order([EA]. >>[Cu(Ⅲ)].) rate constant kobs increases with the increase of [OH-] and decreases with the increase of [IO-4].There is a negative salt effect of addtion of KNO3. The active species and a plausible mechanism involing free redical have been proposed. All the experimental phenomena can be explaimed by the rate equation derived from the mechanism. The rate constant of the rate-determing step together with the activation paraments have also been evaluated.

Key words: Diperodatocuprate(III), Ethanolamine, Redox reation kinetics and mechanism