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The Simplest Amino‐borane H 2 B=NH 2 Trapped on a Rhodium Dimer: Pre‐Catalysts for Amine–Borane Dehydropolymerization
Author(s) -
Kumar Amit,
Beattie Nicholas A.,
Pike Sebastian D.,
Macgregor Stuart A.,
Weller Andrew S.
Publication year - 2016
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.201600898
Subject(s) - borane , rhodium , bimetallic strip , dimer , chemistry , amine gas treating , catalysis , medicinal chemistry , ammonia borane , stereochemistry , organic chemistry , hydrogen production
The μ‐amino–borane complexes [Rh 2 (L R ) 2 (μ‐H)(μ‐H 2 B=NHR′)][BAr F 4 ] (L R =R 2 P(CH 2 ) 3 PR 2 ; R=Ph, i Pr; R′=H, Me) form by addition of H 3 B⋅NMeR′H 2 to [Rh(L R )(η 6 ‐C 6 H 5 F)][BAr F 4 ]. DFT calculations demonstrate that the amino–borane interacts with the Rh centers through strong Rh‐H and Rh‐B interactions. Mechanistic investigations show that these dimers can form by a boronium‐mediated route, and are pre‐catalysts for amine‐borane dehydropolymerization, suggesting a possible role for bimetallic motifs in catalysis.