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)

摘要

A number of ruthenium(II) complexes containing an NNS chelating thioether ligand (L) have been synthesized and characterized by elemental analysis, UV-visible, IR and H-1 NMR spectroscopy and cyclic voltammetry. Ru(L)(PPh3)Cl-2 (1) has been characterized by X-ray diffraction. Structural features of (1) indicate a distorted octahedral coordination environment 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, phenanthroline, 2-picolinate and oxalate were also isolated and the structure of one of the heterochelates has been solved. [Ru(L)(PPh3)(bpy)](ClO4)(2) (2) has also been structurally characterized. The structure and properties of (2) correspond to the predictions based on the structure of (1). (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 29]