Ruthenium(II) complexes containing 4-ferrocenylphenylisocyanide ligands. Crystal structure of trans, trans, trans-[RuCl2(POMeP)2(FcC6H4NC)2] (POMe=PPh2C6H4OCH3; Fc=ferrocenyl)

The ruthenium complexes trans, trans, trans-[RuCl2(POMeP)2(FcC6H4NC)2] (1) (POMe=PPh2C6H4OCH3; Fc=ferrocenyl) and trans, trans, trans-[RuCl2(PC2OMeP)2(FcC6H4NC)2] (2) (PC2OMe=PPh2CH2CH2OCH3) have been prepared by reaction of FcC6H4NC with [RuCl2(POMeP,O)2] (5) and [RuCl2(PC2OMeP,O)2] (6), respectively. The mixed carbonyl–isocyanide complexes trans, trans, trans-[RuCl2(POMeP)2(CO)(FcC6H4NC)] (3) and trans, trans, trans-[RuCl2(PC2OMeP)2(CO)(FcC6H4NC)] (4) were prepared by sequential reaction of 5 and 6 with carbon monoxide and FcC6H4NC, respectively. These complexes have all been characterized by 1H-NMR, 31P-NMR and infrared spectroscopies as well as microanalysis. The solid-state structure of 1 was determined by X-ray crystallography. All three pairs of ligands are trans in this complex, and the ferrocenyl groups are tilted with respect to the phenyl ring plane by 28°. Cyclic voltammetry of these complexes reveals essentially no electronic interaction occurs between the ferrocenyl groups and the Ru.