Synthesis and characterization of ruthenium and osmium complexes of heterocyclic bidentate ligands (N,X), X=S, Se

摘要: The reaction of [RuCl2(PPh3)3] and [OsBr2(PPh3)3] precursors with a series heterocyclic bidentate (N, X) ligands, X = S, Se, gave complexes [M(R-pyS) 2(PPh3)2], (R H, 3-CF3, 5-CF 3, 3-Me3Si); [M(R-pymS)2(PPh3) 2], 4-CF3, 4,6-MeCF3) [M(R-pySe) 3), where M is Ru or Os, pyS pymS the anions pyridine-2-thione pyrimidine-2-thione, respectively, pySe anion produced by reductive cleavage Se-Se bond in dipyridyl-2,2′-diselenide. All compounds obtained were characterized microanalysis, IR, FAB, NMR spectroscopy cyclic voltammetry. Compounds [Ru(3-CF3-pyS) 2(PPh3)2] • 2(CH2Cl 2) (2), [Ru(3-Me3Si-pyS)2(PPh3) 2] (4), [Ru(4-CF3-pymS)2(PPh3) (5), [Ru(3-CF3-pySe)2(PPh3) 2(CH2Cl2) (8), [Os(3-CF 3-pyS)2(PPh3)2] (CHCl 3) (11), [Os(3-Me3Si-pyS)2(PPh 3)2] (13), [Os(3-CF3-pySe)2(PPh (17), [Os(5-CF3-pySe)2(PPh3)2] 2(H2O) (18) [OsCl2(4,6-MeCF3-pymS)(PPh (19) also X-ray diffraction. In all cases, metal distorted octahedral environment ligand acting as S) chelate system. © 2005 Elsevier B.V. rights reserved.