From N-Alkylimidazole Ligands at a Rhenium Center: Ring Opening or Formation of NHC Complexes
MA Huertos, J Pérez, L Riera… - Journal of the …, 2008 - ACS Publications
MA Huertos, J Pérez, L Riera, A Menéndez-Velázquez
Journal of the American Chemical Society, 2008•ACS PublicationsCationic 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.
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.
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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