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- W2247306097 abstract "Coupled oxidation of iron tetraphenylporphyrins bearing either a OMe , Me , F , Cl , COOMe , CF 3 or CN group in the para-position of the phenyl groups gave tetraarylbiladien-ab-1-one and triarylbilindione. The ratios of the yields of the former to those of the latter were linearly correlated with the Hammett substituent constants σ p + , with a positive slope (Δρ = 0.64). The Hammett plot of the oxidation rate vs. the substituent constant σ p also showed a positive slope (ρ = 0.30). These substituent effects suggest that a nucleophilic step is included in the formation of bilindione. Coupled oxidation of an A3B type tetraarylporphyrin having an electron withdrawing nitro group in one of the phenyl groups indicated that the oxidation leading to biladienone occurred rather statistically in any of the meso-positions, while the oxidation leading to bilindione occurred preferentially in the meso-position bearing the 4-nitrophenyl group." @default.
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- W2247306097 date "2015-05-01" @default.
- W2247306097 modified "2023-09-26" @default.
- W2247306097 title "Substituent effects on selectivity of coupled oxidation of iron tetraphenylporphyrins" @default.
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- W2247306097 doi "https://doi.org/10.1142/s1088424615500455" @default.
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