摘要:
A monosubstituted decarbonylation reaction was performed on cis-,cis-[Ru{eta(2)-N(O)C10H6O}(2)(CO)(2)] (cis-NO, cis-O) (A), trans-, cis-[Ru{eta(2)-N(O)C10H2O}(2)(CO)(2)] (trans-NO, cis-O) (B), cis-,cis-[Ru{eta(2)-OC10H6N(O)}(2)(CO)(2)] (C),trans-,cis-[Ru{eta(2)-OC10H6N(O)}(2)(CO)(2)] (D) and cis-,trans-[Ru{eta(2)-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{eta(2)-N(O)C10H6O}(2)(CO)L] (1a, L=ppy; 2a, L=avpy; 3a, L=PPh3), trans-,cis-[Ru{eta(2)-N(O)C10H6O}(2)(CO)L] (1b, L=ppy), cis-,cis[Ru{eta(2)-OC10H6N(O)}(2)(CO)L] (Ic, L=ppy; 2c, L=avpy), trans-,cis-[Ru{eta(2)-OC10H6N(O)}(2)(CO)L] (1d, L=ppy; 2d L=avpy) or cis-,trans-[Ru{eta(2)-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{eta(2)-N(O)C10H6O}(2)L-2] (8a, L = PBu3; 9a, L = fpy; 10a, L = epy; 11a, L = mapy) together with the corresponding mono-GO-substituted complex cis-,cis-[Ru{eta(2)-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 All rights reserved.