Kinetics Of Oxidation Of Some Amino Compounds And Hydroxy Acid By Cu(III) Complex Ion

Kinetics and mechanism of oxidation of alcohol amine, sarcosine, glycyglycine and hydroxy acid by Cu(III) in alkaline medium were studied by spectrophotometry in this paper. The change of kobs with different [reductant], [OH^-], [IO₄^-] and ionic strength were studied, the determining-step rate constants at different temperatures and the activation parameters at 298.2 K were evaluated. Based on the macroscopical orderliness of the reaction, activative center was supposed, the appropriate mechanism was brought forward.Through the experimentation, we found that [Cu(HIO₆)₂]^3- was the main existent form in the alkaline medium. That was consistent with the academic caculations. The kinetics and mechanism from our theory were in accordance with our experimental results.Based on the experimentation, we found that the reaction rate changed with the position and the number of activity group, such as: N,N-diethylethanolamine > N,N-dimethylethanolamin, lactic acid > malic acid, that may because it related to the difficulty of formation of active center by DPC and active redicals and the spatial hindrance of the active group of reducer. In the reaction system of diperiodatocuprate (III) and sarcosine, we brought forward the two different mechanisms because of alkaline value.The hypothesis that the complex was esisted as the deprotonated form was supported by our experimental results. The present discuss and study will provide certain theoretical foundation for the reaction route design of the organic synthesis and quantitative analysis of analytical chemistry. Form the macrosopical experimentation phenomena, we can explain the microstructure of the complex, and conjecture the stability and stucture of the transition state, it is very significative for the development of theory of coordination chemistry.