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Título

Diastereospecific and diastereoselective syntheses of ruthenium(II) complexes using N,N‘ bidentate ligands aryl-pyridin-2-ylmethyl-amine ArNH-CH2-2-C5H4N and their oxidation to imine ligands

AutorGómez Gómez, Carlos Javier; García-Herbosa, Gabriel; Cuevas, José V.; Arnáiz, Ana; Muñoz, Asunción; Falvello, Larry R.
Fecha de publicaciónfeb-2006
EditorAmerican Chemical Society
CitaciónInorganic Chemistry 45(6): 2483-2493 (2006)
ResumenCoordination of N,N‘ bidentate ligands aryl-pyridin-2-ylmethyl-amine ArNH-CH2-2-C5H4N 1 (Ar = 4-CH3-C6H4, 1a; 4-CH3O-C6H4, 1b; 2,6-(CH3)2-C6H3, 1c; 4-CF3-C6H4, 1d) to the moieties [Ru(bipy)2]2+, [Ru(η5-C5H5)L]+ (L = CH3CN, CO), or [Ru(η6-arene)Cl]2+ (arene = benzene, p-cymene) occurs under diastereoselective or diastereospecific conditions. Detailed stereochemical analysis of the new complexes is included. The coordination of these secondary amine ligands activates their oxidation to imines by molecular oxygen in a base-catalyzed reaction and hydrogen peroxide was detected as byproduct. The amine-to-imine oxidation was also observed under the experimental conditions of cyclic voltammetry measurements. Deprotonation of the coordinated amine ligands afforded isolatable amido complexes only for the ligand (1-methyl-1-pyridin-2-yl-ethyl)-p-tolyl-amine, 1e, which doesn't contain hydrogen atoms in a β position relative to the N−H bond. The structures of [Ru(2,2‘-bipyridine)2(1b)](PF6)2, 2b; [Ru(2,2‘-bipyridine)2(1c)](PF6)2, 2c; trans-[RuCl2(COD)(1a)], 3; and [RuCl2(η6-C6H6)(1a)]PF6, 4a, have been confirmed by X-ray diffraction studies.
Descripción11 pages, 9 figures, 2 tables, 5 schemes, 2 chart.-- Supporting Information Available: http://pubs.acs.org.
Versión del editorhttp://dx.doi.org/10.1021/ic051590a
URIhttp://hdl.handle.net/10261/19781
DOI10.1021/ic051590a
ISSN0020-1669
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