Synthesis and characterization of cyclopentadienylruthenium(II) complexes containing N,N ′-donor Schiff base ligands: crystal and molecular structure of [(η5-C5H5)Ru(C5H4N-2-CHN–C6H4–p-OCH3)(PPh3)]PF6

Complexes of the formulae [(η5-C5H5)Ru(PPh3)(C5H5N-2-CHN–C6H4–p-X)]+ [X=H (2a), CH3 (2b), OCH3 (2c), Cl (2d), NO2 (2e)] and [(η5-C5H5)Ru(PPh3)(C5H5N-2-CHN–C6H11)]+ (3) were prepared by reacting para-substituted N-(pyrid-2-ylmethylene)-phenylamines (2-PP) and N-(pyrid-2-ylmethylene)cyclohexylamine (2-PC) with [(η5-C5H5)Ru(PPh3)2Cl] (1) in methanol. These complexes have been isolated as hexa-fluorophosphate salts. Representative complex 2c has been established by single crystal X-ray diffraction analysis. Complex 2c crystallizes in the orthorhombic space group P bcn , with a=21.1560 (11) Å, b=18.3972 (9) Å and c=17.5130 (9) Å, V=6816.3 (6) Å3 and z=8. All these complexes were characterized by FT-IR, 1H NMR and 31P{1H} NMR spectroscopy.