In the title compound, [Ru(C4H3N2S)2(C18H15P)2]·CHCl3, the Ru atom has a distorted octahedral environment formed by two S and two N atoms from the pyrimidine-2-thiolate ligands and two P atoms from the triphenylphosphine ligands. Intramolecular π–πinteractions between the pyrimidine and phenyl rings of triphenylphosphine are observed.

2, 3, 11, 12-Tetramethoxy-3b, 4, 5, 6-tetrahydro-8H-7a-aza-benzo [fg] naphthacen-7-one 7 was synthesized via N-acyliminium ion cyclization of 6-hydroxy-1-(2, 3, 6, 7-tetramethoxyphenanthren- 9-yl-methyl)-piperidin-2-one 6 catalyzed by BF3⋅OEt2. The stereostructure of the intermediate, 1-(2, 3, 6, 7-tetramethoxy-phenanthren-9-yl-methyl)-piperidine-2, 6-dione 5, was confirmed by X-ray crystallographic analysis. Compound 7 showed no cytotoxicity.

Investigations on the catalytic behaviour of titanium complexes formed in situ from Ti(OPri)4 and a variety of Schiff bases, mainly the binaphthyl derivatives 2,2’-bis(3-R1-5-R2-2-hydroxybenzylideneamino)-1,1’-binaphthyl, toward the asymmetric trimethylsilylcyanation of some aromatic and aliphatic aldehydes demonstrated that the titanium complex of the binaphthyl Schiff base with R1=R2=But is one of the best catalysts for such a process, with an enantiomeric excess (e.e.) as high as 96% obtained for m-tolualdehyde. Crystal structure determination of a nitrosylruthenium complex, [RuII(L)(NO)Cl] (L is the dianion of the binaphthyl Schiff base with R1=R2=Cl), revealed that the complex assumes a cis-β configuration with the binaphthyl moiety having a dihedral angle of 70.2. After treatment with AgPF6, the ruthenium complex also exhibited a good catalytic property for the trimethylsilylcyanation of benzaldehyde albeit with a lower e.e. (24%).

Reaction of copper (II) acetate with the (S)-enantiomer of a tridentate binaphthyl Schiff base ligand, 2-(3,5-dichloro-2-hydroxybenzylideneamino)-2'-hydroxy-1,1'-binaphthyl (H2L), in methanol afforded mononuclear copper (II) complex [CuII(HL)2] ((S,S)-1) in 52% isolated yield. The same reaction gave dinuclear copper (II) complex [CuII2 (L)2] ((R,S)-2) in 73% isolated yield whenracemic-H2L was used instead of (S)-H2L. Both complexes (S,S)-1 and (R,S)-2 were characterized by elemental analysis, massspectrometry, and X-ray crystallography. The present work highlights the functioning of ligand chirality as a 'switch' for selectiveformation of mono-and dinuclear metal complexes.

The reaction of [Et3NH] [(m-RE)(m-CO)Fe2(CO)6] (E S, Se) (1) with aryl azides gives bridging triazenido complexes (m-RE)(mp-R1C6H4N3H)Fe2(CO)6 (2-8) (2, RE ButS, R1 H; 3, RE PhS, R1 H; 4, RE ButS, R1 Cl; 5, RE ButS, R1 MeO; 6, RE PhS, R1 MeO; 7, RE PhSe, R1 H; 8, RE PhSe, R1 Cl). These complexes were characterized by elemental analyses and 1H-NMR and IR spectroscopy. The structure of complex 2, established by single-crystal X-ray diffraction analysis, shows that the triazenido ligand binds to two iron centers in a bridging bidentate fashion.