Synthesis, Characterization and Voltammetric Studies of Trinuclear Mixed Valence Iron oxo Complexes [Fe2MO(OAc)6(OH2)3], M (II) = Fe, Co, Cu

Three oxo iron compounds [Fe2MO(OAc)(6)(OH2)(3)]center dot S, where M = Fe(II) (1), Co(II) (2), Cu(II) (3), Ac = COCH3 and S = H2O, CH3OH were synthesized and characterized by mass spectrometry DEI and, DCI techniques and investigated by cyclic voltammetry in dimethylformamide (DMF). It is shown that each complex compound undergoes an electrochemical reduction of the iron(III) metal centers at around -1 V/SCE. The results obtained under these conditions support the existence of significant electronic interactions between homo- and heterometal centers, which may be finally influenced by the nature of the third metal (M).