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Heterometallic Mg−Ba Hydride Clusters in Hydrogenation Catalysis by Michael Wiesinger; Christian Knüpfer; Holger Elsen; Jonathan Mai; Jens Langer; Sjoerd Harder is a Chemistry article available to read on EtoBox.
What is Heterometallic Mg−Ba Hydride Clusters in Hydrogenation Catalysis about?
## Abstract Reaction of a MgN“~2~/BaN”~2~ mixture (N“=N(SiMe~3~)~2~) with PhSiH~3~ gave three unique heterometallic Mg/Ba hydride clusters: Mg~5~Ba~4~H~11~N”~7~ ⋅ (benzene)~2~ (1), Mg~4~Ba~7~H~13~N“~9~ ⋅ (toluene)~2~ (2) and Mg~7~Ba~12~H~26~N”~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.
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- Author
- Michael Wiesinger; Christian Knüpfer; Holger Elsen; Jonathan Mai; Jens Langer; Sjoerd Harder
- Publisher
- Wiley
- Published
- 2021
- Language
- EN
- Field
- Chemistry (Physical Sciences)