Synthesis, characterization and crystal structure of a series of ruthenium nitrosonaphthol complexes

Abstract

A monosubstituted decarbonylation reaction was performed on cis-,cis-[Ru{η2-N(O)C10H6O}2(CO)2] (cis-NO, cis-O) (A), trans-, cis-[Ru{η2-N(O)C10H6O}2(CO)2] (trans-NO, cis-O) (B), cis-,cis-[Ru{η2-OC10H6N(O)}2(CO)2] (C), trans-,cis-[Ru{η2-OC10H6N(O)}2(CO)2] (D) and cis-,trans-[Ru{η2-OC10H6N(O)}2(CO)2] (cis-NO, trans-O) (E) with donor ligand (L) 4-phenylpyridine (ppy), 4-{2-(9-anthryl)vinyl}pyridine (avpy) or triphenylphosphine (PPh3) to give substituted complex cis-,cis-[Ru{η2-N(O)C10H6O}2(CO)L] (1a, L = ppy; 2a, L = avpy; 3a, L = PPh3), trans-,cis-[Ru{η2-N(O)C10H6O}2(CO)L] (1b, L = ppy), cis-,cis-[Ru{η2-OC10H6N(O)}2(CO)L] (1c, L = ppy; 2c, L = avpy), trans-,cis-[Ru{η2-OC10H6N(O)}2(CO)L] (1d, L = ppy; 2d L = avpy) or cis-,trans-[Ru{η2-OC10H6N(O) }2(CO)L] (1e, L = ppy). Progressive substitution of the carbonyl ligands of A by tributylphosphine (PBu3) or functionalized pyridine 4-formylpyridine (fpy), 4-ethylpyridine (epy)or 4-dimethylaminopyridine (mapy) gave a centrosymmetric bisubstituted complex trans-,trans-[Ru{η2-N(O)C10H6O}2L2] (8a, L = PBu3; 9a, L = fpy; 10a, L = epy; 11a, L = mapy) together with the corresponding mono-CO-substituted complex cis-,cis-[Ru{η2-N(O)C10H6O}2(CO)L] (4a, L = PBu3; 5a, L = fpy; 6a, L = epy; 7a, L = mapy). The electronic absorption spectra and metal-localized oxidation formal potentials changed significantly for the bisubstituted complexes compared with the monosubstituted ones. (C) 2000 Elsevier Science Ltd.