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Synthesis and structural chemistry of arene-ruthenium half-sandwich complexes bearing an oxazolinyl-carbene ligand |
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| Authors: | Macarena Poyatos Stéphane Bellemin-Laponnaz Eduardo Peris |
| Institution: | a Laboratoire de Chimie Organométallique et de Catalyse (UMR 7513), Institut Le Bel, Université Louis Pasteur, 4 Rue Blaise Pascal, 67070 Strasbourg, France b Departmento de Química Inorgánica y Orgánica, Universitat Jaume I, Av. Vicente Sos Baynat, s/n 12071 Castellón, Spain c Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany |
| Abstract: | Reaction of a series of directly connected oxazoline-imidazolium salts with silver(I) oxide and subsequent transmetallation with Ru(p-cymene)Cl2]2 and anion exchange with KPF6 cleanly gave the corresponding 2-oxazolinyl-(N-mesityl)imidazolidene(chloro)ruthenium(II) half-sandwich complexes RuCl(oxcarb)(p-cymene)]PF6, two derivatives of which were characterized by X-ray diffraction. Abstraction of the chloro ligand furnished the dicationic aqua complexes Ru(H2O)(oxcarb)(p-cymene)](PF6)2 which possess a similar coordination geometry. The syntheses were found to be highly diastereoselective, since only one diastereoisomer could be observed in all ruthenium complexes upon reaction of the chiral enantiopure oxazoline-imidazolium salts. Their potential as transfer hydrogenation and Lewis acid catalysts has been probed. |
| Keywords: | N-heterocyclic carbene Oxazoline Ruthenium Arene complex Chiral complexes |
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