Heterometallic Mg−Ba Hydride Clusters in Hydrogenation Catalysis

Wiesinger M, Knüpfer C, Elsen H, Mai J, Langer J, Harder S (2021)

Publication Type: Journal article

Publication year: 2021

Journal

DOI: 10.1002/cctc.202101071

Abstract

Reaction of a MgN“2/BaN”2 mixture (N“=N(SiMe3)2) with PhSiH3 gave three unique heterometallic Mg/Ba hydride clusters: Mg5Ba4H11N”7 ⋅ (benzene)2 (1), Mg4Ba7H13N“9 ⋅ (toluene)2 (2) and Mg7Ba12H26N”12 (3). Product formation is controlled by the Mg/Ba ratio and temperature. Crystal structures are described. While 3 is fully insoluble, clusters 1 and 2 retain their structures in aromatic solvents. DFT calculations and AIM analyses indicate highly ionic bonding with Mg−H and Ba−H bond paths. Also unusual H⁻⋅⋅⋅H⁻ bond paths are observed. Catalytic hydrogenation with MgN“2, BaN”2 and the mixture MgN“2/BaN”2 has been studied. Whereas MgN“2 is only active in imine hydrogenation, alkene and alkyne hydrogenation needs the presence of Ba. The catalytic activity of the MgN”2/BaN“2 mixture lies in general between that of its individual components and strong cooperative effects are not evident.

Authors with CRIS profile

Michael Wiesinger Lehrstuhl für Anorganische und Metallorganische Chemie Christian Knüpfer Lehrstuhl für Anorganische und Metallorganische Chemie Holger Elsen Lehrstuhl für Anorganische und Metallorganische Chemie Jonathan Mai Lehrstuhl für Anorganische und Metallorganische Chemie Jens Langer Lehrstuhl für Anorganische und Metallorganische Chemie Sjoerd Harder Lehrstuhl für Anorganische und Metallorganische Chemie

How to cite

APA:

Wiesinger, M., Knüpfer, C., Elsen, H., Mai, J., Langer, J., & Harder, S. (2021). Heterometallic Mg−Ba Hydride Clusters in Hydrogenation Catalysis. ChemCatChem. https://dx.doi.org/10.1002/cctc.202101071

MLA:

Wiesinger, Michael, et al. "Heterometallic Mg−Ba Hydride Clusters in Hydrogenation Catalysis." ChemCatChem (2021).

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