Synthesis and characterization of new complexes of the type [Ru(CO)2Cl2 (2‐phenyl‐1,8‐naphthyridine‐kN) (2‐phenyl‐1,8‐naphthyridine‐kN′)]. Preliminary applications in homogeneous catalysis |
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Authors: | Sergio A. Moya Juana Gajardo Juan C. Araya Jaime J. Cornejo Véronique Guerchais Hubert Le Bozec J. Carles Bayón Alvaro J. Pardey Pedro Aguirre |
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Affiliation: | 1. Universidad de Santiago de Chile, Facultad de Química y Biología, Av Libertador Bernardo òHiggins 3363, Casilla 40, Correo 33, Santiago, Chile;2. Université de Rennes UMR CNRS, 1 6226, Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France;3. Universitat Autónoma de Barcelona, Departament de Química, Unitat de Química Inorgíinica, 08193 Bellaterra, Barcelona, Spain;4. Universidad Central de Venezuela, Facultad de Ciencia, Caracas, Venezuela;5. Universidad de Chile, Facultad de Ciencias Química y Farmacéuticas, Departamento de Química Inforgíinica y Analítica, casilla 233, Santiago 1, Chile |
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Abstract: | Novel ruthenium (II) complexes were prepared containing 2‐phenyl‐1,8‐naphthyridine derivatives. The coordination modes of these ligands were modified by addition of coordinating solvents such as water into the ethanolic reaction media. Under these conditions 1,8‐naphthyridine (napy) moieties act as monodentade ligands forming unusual [Ru(CO)2Cl2(η1‐2‐phenyl‐1,8‐naphthyridine‐ kN )(η1‐2‐phenyl‐1,8‐naphthyridine‐kN′)] complexes. The reaction was reproducible when different 2‐phenyl‐1,8‐naphthyridine derivatives were used. On the other hand, when dry ethanol was used as the solvent we obtained complexes with napy moieties acting as a chelating ligand. The structures proposed for these complexes were supported by NMR spectra, and the presence of two ligands in the [Ru(CO)2Cl2(η1‐2‐phenyl‐1,8‐naphthyridine‐ kN )(η1‐2‐phenyl‐1,8‐naphthyridine‐kN′)] type complexes was confirmed using elemental analysis. All complexes were tested as catalysts in the hydroformylation of styrene showing moderate activity in N,N′‐dimethylformamide. Copyright © 2008 John Wiley & Sons, Ltd. |
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Keywords: | ruthenium complexes naphthyridine homogeneous catalysis styrene hydroformylation |
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