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

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 [H2 BNMeH]n from H3 B?NMeH2 and dimeric [H2 BNMe2 ]2 from H3 B?NMe2 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.

SUBMITTER: Johnson HC 

PROVIDER: S-EPMC4557049 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature