Synthesis of novel rhodium‐xylyl linked N‐heterocyclic carbene complexes as hydrosilylation catalysts |
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Authors: | Ismail Özdemir Serpil Demir Onur ?ahin Orhan Büyükgüngör Bekir Çetinkaya |
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Institution: | 1. ín?nü University, Faculty Science and Art, Department of Chemistry, 44280 Malatya, Turkey;2. Department of Physics, Ondokuz May?s University 55139 Samsun, Turkey;3. Ege University, Faculty Science, Department of Chemistry, 35100 Bornova‐Izmir, Turkey |
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Abstract: | Reaction of ortho‐xylylbis(N‐2,4,6‐trimethylbenzylimidazolinium); xylylbis(N‐butylimidazolinium) and para‐xylylbis(N‐2,4,6‐trimethylbenzylimidazolinium); xylylbis(N‐butylimidazolinium) salts with KOBut and RhCl(COD)]2 yields ortho‐ and para‐xylylbis{(N‐alkylimidazolidin‐2‐ylidene)chloro(η4‐1,5‐cyclooctadiene) rho dium(I)} complexes (2a–d). All compounds synthesized were characterized by elemental analysis and NMR spectroscopy, and the molecular structures of the 2a and 2d were determined by X‐ray crystallography. Triethylsilane reacts with acetophenone derivatives in the presence of catalytic amount of the new rhodium(I)–carbene complexes (2a–d), to give the corresponding silylethers in good yields (83–99%). Copyright © 2008 John Wiley & Sons, Ltd. |
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Keywords: | N‐heterocyclic carbene xylylbis(imidazolinium) salts hydrosilylation rhodium |
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