From N-alkylimidazole ligands at a rhenium center: ring opening or formation of NHC complexes |
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Authors: | Huertos Miguel A Pérez Julio Riera Lucía Menéndez-Velázquez Amador |
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Institution: | Departamento de Química Orgánica e Inorgánica-IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33006 Oviedo, Spain. |
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Abstract: | Cationic rhenium tricarbonyl complexes with three N-alkylimidazole ligands undergo deprotonation of the central CH group upon reaction with 1 equiv of KN(SiMe3)2. For the tris(N-methylimidazole) complex, the metal fragment shifts from N to C, leaving an NHC complex with a nonsubstituted N atom. For compounds with at least one N-mesitylimidazole ligand, the intramolecular attack of the deprotonated carbon onto the central carbon of an N-mesitylimidazole ligand results in ring opening of the latter. |
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