SYNTHESIS, CHARACTERIZATION AND REACTIVITY OF CIS-RU(L)(PPH3)CL-2, L = 2-PYRIDYL-N-(2'-METHYLTHIOPHENYLMETHYLENEIMINE) - CRYSTAL-STRUCTURE OF CIS-RU(L)(PPH3)CL-2 AND [RU(L)(PPH3)(BPY)](CLO4)(2)

A number of ruthenium(II) complexes containing an NNS chelating thioet her ligand (L) have been synthesized and characterized by elemental an alysis, UV-visible, IR and H-1 NMR spectroscopy and cyclic voltammetry . Ru(L)(PPh3)Cl-2 (1) has been characterized by X-ray diffraction. Str uctural features of (1) indicate a distorted octahedral coordination e nvironment around the ruthenium(II) centre. The two chlorides are cis to each other with the Ru-Cl(1) bond trans to PPh3 longer than the Ru- Cl(2) bond. Several mixed-ligand complexes containing bipyridine, phen anthroline, 2-picolinate and oxalate were also isolated and the struct ure of one of the heterochelates has been solved. [Ru(L)(PPh3)(bpy)](C lO4)(2) (2) has also been structurally characterized. The structure an d properties of (2) correspond to the predictions based on the structu re of (1). (C) 1998 Elsevier Science Ltd. All rights reserved.