The Simplest Amino‐borane H2B=NH2 Trapped on a Rhodium Dimer: Pre‐Catalysts for Amine–Borane Dehydropolymerization. (21st April 2016)

• Record Type: Journal Article
• Authors: Kumar, Amit; Beattie, Nicholas A.; Pike, Sebastian D.; Macgregor, Stuart A.; Weller, Andrew S.
• Is Part Of: Angewandte Chemie. Volume 128:Number 23(2016)
• Page Start: 6763
• Page End: 6768
• Publication Date: 2016-04-21
• Subjects: Amin-Boran -- Dehydrierende Kupplungen -- Dichtefunktionalrechnungen -- Reaktionsmechanismen -- Rhodium; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201600898
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The μ‐amino–borane complexes [Rh2 (L R )2 (μ‐H)(μ‐H2 B=NHR′)][BAr F 4 ] (L R =R2 P(CH2 )3 PR2 ; R=Ph, i Pr; R′=H, Me) form by addition of H3 B⋅NMeR′H2 to [Rh(L R )(η 6 ‐C6 H5 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.