Synthesis and Electrochemical Properties of Two Transition Metal Coordination Complexes Based on 4-Pyridyl-Substituted TTF Ligand

The synthesis, crystal structures, and electrochemical properties of two transition metal coordination complexes, Co(acac)2•(EDO-TTF-4-py)2•2CH3CN 1, and ZnBr2•(EDO-TTF-4-py)2 2, are reported, where acac = acetylacetonate and EDO-TTF-4-py, L1 (EDO-TTF = ethylenedioxotetrathiafulvalene; py = pyridine). In complex 1, two N atoms from L1 are coordinated in the trans configuration to the Co(II) ion of Co(acac)2 to form an octahedral Co complex. And in complex 2, the Zn(II) atom is tetrahedral by two N atoms from L1 and two Br ions. Cyclic voltammetry measurements for both complexes show a sizable interaction involving the electroactive L1 ligand and the metal ion.