Kinetics And Mechanism Of Oxidation Of Some Alcohol Ethers,Alcohols And Carbohydrate Organic Compound By Ag(Ⅲ) Complex

Kinetics and mechanism of oxidation of 2-(2-methoxyethoxy)-ethanol(MEE), 2-(2-ethoxyethoxy)-ethanol, Mannitol, Inositol, Methyl α-D-mannopyranoside and Methyl α-D-glucopyranoside by Ag(III) in alkaline medium were studied by spectrophotometry in this paper.Through the experimentation, we found that the main existed form of DTA(III) was the deprotonated complex [Ag(H4Te O6)2]- in alkaline medium, and we proposed that the deprotonated complex Ag(H3Te O6), as the activation center, formed the intermediate with the reductant. Through the redox reaction, we get the reaction mechanism of the product.The reaction rate showed first order dependence in DTA in the temperature range of 293.2 K-313.2 K. The change of kobs with different [reductant], [H4Te O62-], [OH-] and ionic strength were studied, the determining-step rate constants at different temperatures and the activation parameters at 298.2 K were evaluated. We inferred the reasonable mechanism through the experimentation.Through the experimentation, we found that DTA can oxidize different types of reductions. When the reductants’ s active group are on the different positions, the rate of the reaction is different. The first-order rates with respect to 2-(2-methoxyethoxy)-ethanol, 2-(2-ethoxyethoxy)-ethanol, Mannitol and Inositol were all found, while fractional order in Methyl α-D-mannopyranoside and Methyl α-D-glucopyranoside.The supposed mechanism could favorably explain the reaction results. Through the study of the ditelluratoargentate(III) reaction system, it can provides a favorable evidence for the development of dynamic.