PC‐Activated Bimetallic Rhodium Xantphos Complexes: Formation and Catalytic Dehydrocoupling of Amine–Boranes |
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Authors: | Dr. Heather C. Johnson Prof. Andrew S. Weller |
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Affiliation: | Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK) |
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Abstract: | {Rh(xantphos)}‐based phosphido dimers form by P? C activation of xantphos (4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene) in the presence of amine–boranes. These dimers are active dehydrocoupling catalysts, forming polymeric [H2BNMeH]n from H3B?NMeH2 and dimeric [H2BNMe2]2 from H3B?NMe2H at low catalyst loadings (0.1 mol %). Mechanistic investigations support a dimeric active species, suggesting that bimetallic catalysis may be possible in amine–borane dehydropolymerization. |
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Keywords: | amine– boranes homogeneous catalysis P ligands rhodium X‐ray diffraction |
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