Ruthenium(II) complexes containing 4-ferrocenylphenylisocyanide ligands. Crystal structure of trans, trans, trans-[RuCl2(POMe-P)(2)(FcC(6)H(4)NC)(2)](POMe = PPh2C6H4OCH3; Fc = ferrocenyl)

The ruthenium complexes trans, trans, trans-[RuCl2(POMe-P)(2)(FcC(6)H(4)NC) (2)] (1) (POMe = PPh2C6H4OCH3; Fc = ferrocenyl) and trans, trans, trans -[R uCl2(PC2OMe-P)(2)(FCC6H4NC)(2)] (2) (PC2OMe = PPh2CH2CH2OCH3) have been pre pared by reaction of FcC(6)H(4)NC 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)(FcC(6)H(4)NC)] (3) and trans, tr ans, trans -[RuCl2(PC2OMe-P)(2)- (CO)(FcC(6)H(4)NC)] (4) were prepared by s equential reaction of 5 and 6 with carbon monoxide and FcC(6)H(4)NC, respec tively. These complexes have all been characterized by H-1-NMR, P-31-NMR an d infrared spectroscopies as well as microanalysis. The solid-state structu re 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 respe ct to the phenyl ring plane by 28 degrees. Cyclic voltammetry of these comp lexes reveals essentially no electronic interaction occurs between the ferr ocenyl groups and the Ru. (C) 2001 Elsevier Science B.V. All rights reserve d.