Syntheses, characterization and properties of oxo-centered triruthenium cluster with tetrathiafulvalene-fused ligands

A series of oxo-centered triruthenium–acetate complexes with tetrathiafulvalene-fused ligands, [Ru3O(OAc)6(py)2(dtpy)](PF6) (2, py = pyridine, dtpy = 4′,5′-dimethyldithiotetrathiafulvenyl-4-pyridine), [Ru3O(OAc)5{μ-η1(C), η2(N,N)-L}(py)2](PF6) (L = dtpn, 3, L = btpn, 4; dtpn = 4′,5′-dimethyldithiotetrathiafulvenyl[4,5-f][1,10]phenanthroline, btpn = 4′,5′-bis(methyloxycarbonyl)dithiotetrathiafulvenyl[4,5-f][1,10]phenanthroline), have been prepared. These new compounds are characterized by UV–vis, IR, 1H NMR, ESI-MS spectroscopic methods and elemental analysis. Cyclic and differential-pulse voltammetry reveal that all the compounds show interesting stepwise redox processes in solution.