Syntheses and characterization of arene ruthenium (II) complexes containing N,N′-donor Schiff base ligands.: Crystal and molecular structure of [(η6-C6Me6)Ru(C5H4N-2-CH=N-C6H4-p-NO2)]PF6

Reaction of [(eta(6)-C6Me6)RuCl2](2) (1a) with N,N'-donor Schiff bases viz., para- substituted N-(2-pyridinylmethylene)phenylamines yielded complexes of the formulation [(eta(6)-C6Me6)Ru(C5H4N-2-CH=N-C6H4-p-X)Cl](+) 2a-e where C6Me6 = hexamethylbenzene, X = H (2a), CH3 (2b), OCH3 (2c) Cl (2d) and NO2 (2e). Reaction of 1a and [(eta(6)-p-cymene)RuCl2](2) (1b) where p-cymene = (CH3C6H4CH(CH3)(2)) with N-(2-pyridinylmethylene)cyclohexylamine (2-PC) yielded complexes of the type [(eta(6)-arene)Ru(2-PC)Cl](+) (arene = C6Me6 (3a); p -cymene, (3b)) respectively. All these complexes were isolated as their PF6 salt. These complexes were characterized by spectroscopic and analytical data. The molecular structure of [(eta(6)-C6Me6)Ru(C5H4N-2-CH=N-C6H4-p-NO2)Cl]PF6 2e has been determined by X-ray crystallography. (C) 2003 Elsevier Science Ltd. All rights reserved.