The Simplest Amino-borane H2B=NH2 Trapped on a Rhodium Dimer: Pre-Catalysts for Amine-Borane Dehydropolymerization

Amit Kumar, Nicholas Beattie, Sebastian D Pike, Stuart Alan Macgregor, Andrew S Weller

Research output: Contribution to journalArticle

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Abstract

The μ-amino-borane complexes [Rh2(LR)2(μ-H)(μ-H2B=NHR′)][BArF 4] (LR=R2P(CH2)3PR2; R=Ph, iPr; R′=H, Me) form by addition of H3B NMeR′H2 to [Rh(LR)(η6-C6H5F)][BArF 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.
Original languageEnglish
Pages (from-to)6651–6656
Number of pages6
JournalAngewandte Chemie International Edition
Volume55
Issue number23
Early online date21 Apr 2016
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • Amino-borane
  • Catalytic mechanisms
  • Dehydrocoupling
  • DFT
  • Rhodium dimers

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