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NHI- and NHC-Supported Al(III) Hydrides for Amine–Borane Dehydrocoupling Catalysis

1
WACKER-Institute of Silicon Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching bei München, Germany
2
Department of Chemistry and Chemical Biology, Gunma University, Kiryu 376-8515, Japan
*
Author to whom correspondence should be addressed.
Inorganics 2019, 7(8), 92; https://doi.org/10.3390/inorganics7080092
Received: 26 June 2019 / Revised: 11 July 2019 / Accepted: 12 July 2019 / Published: 24 July 2019
(This article belongs to the Special Issue Organoaluminum Compounds)
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Abstract

The catalytic dehydrocoupling of amine–boranes has recently received a great deal of attention due to its potential in hydrogen storage applications. The use of aluminum catalysts for this transformation would provide an additional cost-effective and sustainable approach towards the hydrogen economy. Herein, we report the use of both N-heterocyclic imine (NHI)- and carbene (NHC)-supported Al(III) hydrides and their role in the catalytic dehydrocoupling of Me2NHBH3. Differences in the σ-donating ability of the ligand class resulted in a more stable catalyst for NHI-Al(III) hydrides, whereas a deactivation pathway was found in the case of NHC-Al(III) hydrides. View Full-Text
Keywords: aluminum; amine–borane; dehydrocoupling; homogeneous catalysis; N-heterocyclic carbenes; N-heterocyclic imines aluminum; amine–borane; dehydrocoupling; homogeneous catalysis; N-heterocyclic carbenes; N-heterocyclic imines
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Weetman, C.; Ito, N.; Unno, M.; Hanusch, F.; Inoue, S. NHI- and NHC-Supported Al(III) Hydrides for Amine–Borane Dehydrocoupling Catalysis. Inorganics 2019, 7, 92.

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