The resonance Raman spectra of intermediate-spin ferrous porphyrin

Abstract The resonance Raman and absorption spectra of unligated ferrous octaethylporphyrin [Fe 2+ (OEP)] and its adduct with 2-MeIm or THF were observed. The resonance Raman spectrum of Fe 2+ (OEP) in CH 2 Cl 2 displayed characteristic features of iron porphyrin with three d π electrons, suggesting 3 E g as the intermediate-spin ( S = 1) ground state. Fe 2+ (OEP) in THF exhibited the ferrous high spin feature like Fe 2+ (OEP) (2-MeIm) in CH 2 Cl 2 .

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