Square Planar Ru( <i> <sup>i</sup> </i> Pr <sub>2</sub> PCH <sub>2</sub> CH <sub>2</sub> NH) <sub>2</sub> and its Role in Fast and Selective Catalytic Amine–Borane Dehydropolymerization to Form High Molecular Weight Polyaminoboranes
Addition of <sup>t</sup>BuOK to orange RuCl<sub>2</sub>(<sup>i</sup>Pr<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub>)<sub>2</sub> forms the pink, square planar, Ru(II) complex Ru(<sup>i</sup>Pr<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>NH)<sub>2</sub>. This is an active catalyst (ToF 250 s<sup>-1</sup>) for the dehydropolymerization of H<sub>3</sub>B·NMeH<sub>2</sub> to give high molecular weight polyaminoborane, [H<sub>2</sub>BNMeH]<sub>n</sub> (M<sub>n</sub> = 138 700 g mol<sup>-1</sup>) at low loadings (0.03 mol%). An induction period observed is due to the initial formation of a hydroxy-hydride species, Ru(<sup>i</sup>Pr<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub>)<sub>2</sub>(OH)(H), prior to fast turnover.
Authors
- M. Arif Sajjad (ORCID: https://orcid.org/0000-0002-4119-9912)
- Andrew S. Weller (ORCID: https://orcid.org/0000-0003-1646-8081)
- Mathew J. Cross (ORCID: https://orcid.org/0000-0003-3495-442X)
- Stuart A. Macgregor (ORCID: https://orcid.org/0000-0003-3454-6776)
Institutions
- University of St Andrews (GB)
- University of York (GB)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2025-04-08
- DOI
- https://doi.org/10.1002/anie.202500019
- Citations
- 3
- Primary Topic
- Boron Compounds in Chemistry
- Type
- article
- Field-Weighted Citation Impact
- 4.08
Funders
- Engineering and Physical Sciences Research Council