The resonance Raman spectra of ( n Bu 4 N)[Fe(CN) 2 TPP] (( n Bu 4 : tetra(n-butyl)ammonium; TPP: m-tetraphenylporphyrin), K 3 [Fe(CN) 6 ] and [Fe(C 5 H 5 ) 2 ]BF 4 have been investigated. A molecular electronic Raman (ER) effect at 545 cm -1 is observed for ( n Bu 4 N)[Fe(CN) 2 TPP]. The transition occurs between lower “Γ 7 ” and upper “Γ 8 ” level of the spin-orbit split ground state assuming pseudo-octahedral symmetry. In contrast to earlier studies no ER effect is detected for K 3 [Fe(CN) 6 ] and [Fe(C 5 H 5 ) 2 ]BF 4 . For Raman shifts < 800 cm -1 only one strong Raman line is observed for [Fe(C 5 H 5 ) 2 ]BF 4 at 311 cm -1 , assigned to the iron ring stretch designated by ν4 (a 1g in D 5d ). Due to a phase transition of K 3 [Fe(CN) 6 ], two additional strong vibrational lines at 329 and 352 cm-1 appear in the Raman spectrum taken at 10 K. Their intensities show A "term" behaviour of the resonance Raman effect with overtones and combinations for both lines. These are components of the vibronic combinations with the ν 6 , ν 7 , and ν 8 modes (t 1u in O h ) in the IR spectra, too.