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PC‐Activated Bimetallic Rhodium Xantphos Complexes: Formation and Catalytic Dehydrocoupling of Amine–Boranes
Author(s) -
Johnson Heather C.,
Weller Andrew S.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201504073
Subject(s) - xantphos , bimetallic strip , chemistry , catalysis , borane , amine gas treating , boranes , rhodium , medicinal chemistry , polymer chemistry , organic chemistry , palladium , boron
{Rh(xantphos)}‐based phosphido dimers form by PC 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.