Studics on the Oxidation of μ-Oxo-bis (manganese(Ⅲ)porphyrin)Complexes and Substituted Effect

Abstract

Abstract: The oxidation of μ-oxo-bis(tetraphenylporphinatomanganese) [TPPMn (Ⅲ)]₂O with the oxidants such as PhIO.H₂O_O and air is studied.The amounts of [TPPMn(Ⅲ)]₂O in the reaction system is shown by monitoring the reaction with UV-Vis spectrum instrument.The different mechanisms may be presented when [TPPMn(Ⅲ)]₂Oreacted with different oxidants.The substituent effect and solvent effect in the reactions of the substitutedμ-oxo-bis (manganeseporphyrin)[TXPPMn (Ⅲ)]₂O (X=p-(i-Pr),P-CH₃,p-Cl, P-F,P-OCH₃,H,m-Cl,o-Cl) with H₂O₂ are also studied.The research results show that abovereaction is accelerated by both electrondrawing substituents on porphyrin ring and nucleophilicity of solvents.

Key words: Porphyrin, Oxidation, Substituent effect.Solvent effect

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GUO Can-Cheng, DING Liang-Zhong, LIANG Ben-Xi, CHEN Xin-Bin. Studics on the Oxidation of μ-Oxo-bis (manganese(Ⅲ)porphyrin)Complexes and Substituted Effect[J]. Chem. J. Chinese Universities, 1996, 17(4): 558.

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Studics on the Oxidation of μ-Oxo-bis (manganese(Ⅲ)porphyrin)Complexes and Substituted Effect

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