Autoxidation of thiols in the presence of water-soluble metalloporphyrins

Abstract

In the presence of water-sol. metalloporphyrins, the autoxidn. of Bu mercaptan was studied. When different metallotetrapyridyl-porphyrins (CoTPyP, MnTPyPCl, FeTPyPCl, NiTPyP, CuTPyP, ZnTPyP) were used as catalysts, only CoTPyP exhibited distinct activity. With different cobalt porphyrins as catalysts, the activity decreased in the order of CoTPyP>Co(p-SO3Na)TPP>Co(p-OH)TPP>Co(p-NH2)TPP>CoTPP. The relationship between the reaction rate and the thiol concentration was measured. At high concns. a saturation effect was observed Michaelis-Menten kinetics appear to be obeyed. The effect of some kinetic factors (the concentration of catalyst, the concentration of alkali, and the concentration of pyridine additive) on the oxidation reaction was also investigated.

Key words: MERCAPTAN, CATALYST, WATER SOLUBILITY, METAL COMPLEX, PORPHYRIN, CATALYTIC ACTIVITY, KINETIC STUDY, OXIDATION REACTION

CLC Number:

O643

Cite this article

WANG XIANYUAN;WANG YOUZHI;LI GUANGNIAN. Autoxidation of thiols in the presence of water-soluble metalloporphyrins[J]. Acta Chimica Sinica, 1991, 49(5): 477-482.

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