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- Title
Stoichiometric and Catalytic Reduction of Carbon Dioxide by a Sterically Encumbered Amidinato Magnesium Hydride.
- Authors
Huadsai, Wimonsiri; Vendier, Laure; Görls, Helmar; Magna, Lionel; Bontemps, Sébastien; Westerhausen, Matthias
- Abstract
A sterically encumbered dinuclear amidinato magnesium hydride 3 with bridging hydrido ligands was synthesized from the metalation of the corresponding amidine 1 with dibutylmagnesium and subsequent treatment with phenylsilane. This complex reacts stoichiometrically with 1 atm of carbon dioxide at room temperature in tetrahydrofuran (THF) to the corresponding bis(thf) adduct of the dinuclear formate complex 4‐2 thf with bridging formate anions. This complex is stable in THF at 60 °C for more than 16 hours but decomposes into the amidine 1 upon removal of ligated thf ligands. Complex 3 efficiently catalyzes the reduction of carbon dioxide with 9‐BBN, yielding bis(boryl)acetal (R2BO)2CH2, and with silanes H4‐nSiPhn (n=1, 2, and 3). The bis(silyl)acetal is quantitatively accessible for Ph3SiH (n=3) whereas during the reduction of CO2 with hydrogen‐richer silanes (n=1, 2) siloxanes form and methane evolves.
- Subjects
CARBON dioxide reduction; CATALYTIC reduction; MAGNESIUM hydride; METALATION; MAGNESIUM compounds; CARBON dioxide; MAGNESIUM diboride
- Publication
European Journal of Inorganic Chemistry, 2024, Vol 27, Issue 20, p1
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.202400128