Kinetics And Mechanism Of Oxidation Of Some Alcohol And Carboxylic Acids Organic Compound By Cu(â…¢) Complex

The article studies that kinetics and mechanism of oxidation of2-(2-methoxyetthoxy)-ethanol,2-(2-ethoxyethoxy)-ethanol, treithylene glycol, tetraethylene glycol, valine,2-aminoisobutyric acid by Cu(III) complex.In the paper, the Cu(III) complex main included ditelluratocuprate(III) and diperiodatocuprate(III), some researchers considered that the activation center should be protonated complexes such as [Cu(H3IO6)]-in the reaction. However, we found that the activation center of the Cu(III) complex was the deprotonated complex such as Cu(H3Te06) and [Cu(HIO6)]-in alkaline medium. Then the activation center formed the intermediate with the reductant to achieve internal electron transfer reaction.In reaction system for DTC, the reaction were fractional order in2-(2-methoxyetthoxy)-ethanol,2-(2-ethoxyethoxy)-ethanol, treithylene glycol, tetraethylene glycol, valine, and l<nap<2in2-aminoisobutyric acid. In addition, the various functional group of the reductant effected on the pseudo-first order rate constant kobs. For example, kobs increased with an increase in [OH"] for alcoholic reductant whereas decrease in [OH"] for Amino acids. In reaction system for DPC, the reaction were l<nap<2in2-(2-methoxyetthoxy)-ethanol,2-(2-ethoxyethoxy)-ethanol. We found that the kobs decreased rapidly with an increase in [OH"] to a certain value, then increasing with the continuous increase in [OH"]. So the two plausible mechanisms were proposed in the stronger and weaker alkaline medium.The mechanism that we supposed can explain all experimental phenomena, and verified the existed form of deprotonated complex was more reasonable. The studies for these system not only can provide valuable information for reaction kinetics study, but also can offer theoretical foundation for for the reaction route design of the organic synthesis.