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• W2040257403 abstract "Abstract The electrochemical behavior of μ-oxo- N , N -bis- (5-( o -phenyl)-10,15,20-triphenylporphinatoiron(III))- urea mono hydrate, [(FF)Fe] 2 0, was investigated at a platinum electrode in both 1,2-dichloroethane and pyridine. In EtCl 2 , electroreduction of this oxo-bridged and urea-linked dimer produced a binuclear ferrous hydroxide porphyrin. This latter species could be oxidized to regenerate the μ-oxo dimer in quantitative yield. In pyridine, [(FF)Fe] 2 O underwent a chemically irreversible electroreduction producing a hexacoordinate binuclear ferrous porphyrin with pyridine occupying the axial positions of each iron atom. Oxidation of this species also produced the μ-oxo and urea-linked dimer in quantitative yield. These results are in contrast to the redox behavior of [(TPP)Fe] 2 O in these solvents. Electron transfer pathways, consistent with voltammetric and spectroelectrochemical results, are proposed for [(FF)Fe] 2 O and compared with those found for [(TPP)Fe] 2 O. The redox behavior observed for [(FF)Fe] 2 O implicates the steric constraint of the urea linkage and hydrogen bonding of the protonated bridging oxygen atom with the amide groups. This marks the first evidence of molecular environmental effects in the redox chemistry of hematin dimers." @default.
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• W2040257403 date "1986-11-01" @default.
• W2040257403 modified "2023-09-27" @default.
• W2040257403 title "Spectroelectrochemistry of a urea-linked oxo-bridged iron porphyrin dimer" @default.
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• W2040257403 doi "https://doi.org/10.1016/s0020-1693(00)84714-3" @default.
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