Synthesis,Structure and Electrochemistry of Triruthenium Cluster Complex Ru3(μ3-O)(μ-CH3CO2)6(py)2(PPh2py)(PF6)·CH2Cl2

摘要

The reaction between [Ru3(μ3-O)(μ-CH3CO2)6(py)2(MeOH)](PF6) (py = pyri- dine) and diphenyl-2-pyridyl-phosphine (PPh2py) gave the triruthenium cluster complex [RuIII3(μ3-O)(μ-CH3CO2)6(py)2(PPh2py)](PF6)·CH2Cl2 (C40H44Cl2F6N34O13P2Ru3) which was characterized by elemental analysis, IR, UV-Vis and 31P NMR spectroscopy, and X-ray single- crystal diffraction. The structure is of monoclinic, space group P21 with a = 16.3896(1), b = 16.8773(2), c = 19.1438(2)A,β= 95.888(1)°, V = 5267.47(9)A3, Mr = 1324.83, Dc = 1.671 g/cm3, F(000) = 2636,μ = 1.092 mm-1 and Z = 4. The final refinement gave R = 0.0508 and wR = 0.1111 for 6987 observed reflections (I > 2σ(I)). Three Ru(III) atoms bridged by (3-oxo donor form an approximately isosceles triangle. The complex shows three quasireversible one- electron processes at E1/2 = -1.22 +0.03 and 1.20 V vs. Ag/AgCl.