摘要
The kineties and mechanism of oxidation of α-alanine by diperiodatocuprate (Ⅲ) ion was studied by spectrophotometry in alkaline medium. The reaction rate showed first order dependance in oxidant and 1.25 order dependance in α-alamne. It was found that the pesudo first-order ([Ala].》 [Cu(Ⅲ)].) rate constant kobs increases with the increases in [OH] and decreases with the increases in [IO]. The hnear relationships between [Ala/kobs and 1/[Ala] and between 1/kobs and [IO] were observed in our experiment. There is a positive salt effect. Under the protection of nitrogen gas, the reaction system can induce polyn1erzation of acrylamide. A plausible mechanism involving free redicals has been proposed. The rate equations derived from the mechanism explained all the experimental results satisfactorily. The rate constant activation paIameters of rate determing step have been calculated.
The kineties and mechanism of oxidation of α-alanine by diperiodatocuprate (Ⅲ) ion was studied by spectrophotometry in alkaline medium. The reaction rate showed first order dependance in oxidant and 1.25 order dependance in α-alamne. It was found that the pesudo first-order ([Ala].》 [Cu(Ⅲ)].) rate constant kobs increases with the increases in [OH] and decreases with the increases in [IO]. The hnear relationships between [Ala/kobs and 1/[Ala] and between 1/kobs and [IO] were observed in our experiment. There is a positive salt effect. Under the protection of nitrogen gas, the reaction system can induce polyn1erzation of acrylamide. A plausible mechanism involving free redicals has been proposed. The rate equations derived from the mechanism explained all the experimental results satisfactorily. The rate constant activation paIameters of rate determing step have been calculated.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1994年第12期1110-1115,共6页
Acta Physico-Chimica Sinica
关键词
二过碘酸合铜
氧化还原反应
氨基丙酸
动力学
Diperiodato cuprate(Ⅲ), α-Alanine, Redox reaction, Kinetics and mechanism
