P–C-Activated Bimetallic Rhodium Xantphos Complexes: Formation and Catalytic Dehydrocoupling of Amine–Boranes**

{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 [H(2)BNMeH](n) from H(3)B⋅NMeH(2) and dimeric [H(2)BNMe(2)](2) from H(3)B⋅...

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Detalles Bibliográficos
Autores principales: Johnson, Heather C, Weller, Andrew S
Formato: Online Artículo Texto
Lenguaje:English
Publicado: WILEY-VCH Verlag 2015
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4557049/
https://www.ncbi.nlm.nih.gov/pubmed/26140498
http://dx.doi.org/10.1002/anie.201504073
Descripción
Sumario:{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 [H(2)BNMeH](n) from H(3)B⋅NMeH(2) and dimeric [H(2)BNMe(2)](2) from H(3)B⋅NMe(2)H 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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