Ring-shaped phosphinoamido-magnesium-hydride complexes : syntheses, structures, reactivity, and catalysis
Date
11/07/2016Metadata
Show full item recordAbstract
A series of magnesium(II) complexes bearing the sterically demanding phosphinoamide ligand, L−=Ph2PNDip−, Dip=2,6-diisopropylphenyl, including heteroleptic magnesium alkyl and hydride complexes are described. The ligand geometry enforces various novel ring and cluster geometries for the heteroleptic compounds. We have studied the stoichiometric reactivity of [(LMgH)4] towards unsaturated substrates, and investigated catalytic hydroborations and hydrosilylations of ketones and pyridines. We found that hydroborations of two ketones with pinacolborane using various Mg precatalysts is very rapid at room temperature with very low catalyst loadings, and ketone hydrosilylation using phenylsilane is rapid at 70 °C. Our studies point to an insertion/σ-bond metathesis catalytic cycle of an in situ formed “MgH2” active species.
Citation
Fohlmeister , L & Stasch , A 2016 , ' Ring-shaped phosphinoamido-magnesium-hydride complexes : syntheses, structures, reactivity, and catalysis ' , Chemistry - A European Journal , vol. 22 , no. 29 , pp. 10235–10246 . https://doi.org/10.1002/chem.201601623
Publication
Chemistry - A European Journal
Status
Peer reviewed
ISSN
1521-3765Type
Journal article
Description
A.S. is grateful to the Australian Research Council for project support and a fellowship.Collections
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