Symmetrically bridged bis-N-heterocyclic carbene rhodium (I) complexes and their catalytic application for transfer hydrogenation reaction |
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| Authors: | Nade?da B. Joki?,Serena L.M. Goh,Bettina Bechlars,Fritz E. Kü hn |
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| Affiliation: | a Chair of Inorganic Chemistry, Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str.1, 85747 Garching b., München, Germany
b Molecular Catalysis, Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str.1, 85747 Garching b., München, Germany |
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| Abstract: | Bridged rhodium(I) bis(NHC) complexes of the formula [bis-(NHC)Rh(I)PF6] (1c-5c) were synthesized and applied as catalysts in the transfer hydrogenation of acetophenone in 2-propanol. The activity of the rhodium(I) complexes largely depends on the nature of the N-substituents and the applied bases. The synthesized compounds were characterized by elemental analysis, 1H and 13C NMR-spectroscopy and mass spectrometry. The structure of complex 2c was exemplary determined by X-ray analysis. |
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| Keywords: | N-Heterocyclic carbenes Rhodium-NHC complexes Transfer hydrogenation |
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