CHEMISTRY OF PYRIDINETHIOLS AND RELATED LIGANDS .4. COMPLEXES OF BIS(PYRIDINE-2-THIOLATO OR 1-OXOPYRIDINE-2-THIONE) RUTHENIUM(II) WITH BIS(DIPHENYLPHOSPHINO)ALKANES

A series of ruthenium(II) mixed-ligand complexes containing 2(1H)-pyri dinethione (C5H5NS) or 1-hydroxypyridine-2-thione (C5H5NOS) and bis(di phenylphosphino) alkanes, Ph(2)P(CH2)(m)PPh(2) (m = 1-4), and a triter tiaryphosphine, (Ph(2)PCH(2)CH(2))(2)PPh (triphos), of stoichiometry: RuA(2)L (HA = C5H5NS or C5H5NOS; L = a di- or tri-tertiary phosphine) have been prepared. The complexes were obtained by the reactions of (i ) RuL(n)Cl(2) [n = 2 for L (m = 1, 3) or n = 1.5 for L (m = 4)] with H A ligands in the presence of triethylamine, (ii) RuA(2)(PPh(3))(2) wit h L (m = 2; triphos; HA = C5H5NS), or (iii) RuCl2(PPh(3))(3) with C5H5 NOS and L (m = 2; triphos) in the presence of triethylamine and charac terized using analytical data, IR, far-IR, UV-vis, H-1 and C-13 NMR, a nd cyclic voltammetry. The geometry about Ru-II is distorted octahedra l with S-Ru-S in the bent trans-configuration (S-Ru-S, ca 155 degrees) , with phosphines occupying cis-positions.