Stabilisation of the [SiH6]2– Anion within a Supramolecular Assembly

Ryan Huo, Alicia Armstrong, Gareth Nelmes, Douglas Lawes, Alison Edwards, Claire McMullin, Jamie Hicks

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Abstract

The hypercoordinate [SiH6]2– anion is not stable in solution. Here, we report the room temperature, solution stable molecular [SiH6]2– complex, [{KCa(NON)(OEt2)}2][SiH6] (NON = 4,5-bis(2,6-diisopropylanilido)-2,7-di-tertbutyl-9,9-dimethyl-xanthene)), where the [SiH6]2– anion is stabilised within a supramolecular assembly that mimics the solid-state environment of the anion in the lattice of K2SiH6. Solution-state reactivity of the complex towards carbon monoxide, benzaldehyde, azobenzene and acetonitrile is reported, yielding a range of reduction and C–C coupled products.
Original languageEnglish
Article numbere202400662
JournalChemistry - A European Journal
Volume30
Issue number25
Early online date8 Mar 2024
DOIs
Publication statusPublished - 2 May 2024

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

Funding

JH would like to thank the Australian Research Council (DP210100454) for the funding of this work. The authors would like to acknowledge the award of neutron beam‐time on the KOALA2 instrument at ANSTO (Proposal 16394) and note that is the first structure acquired on the newly commissioned KOALA2 instrument to be reported. Furthermore, this study includes the first data to be reported using the widebore cryostream from Oxford Cryosystems developed in collaboration with ANSTO. This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI Australia), an NCRIS enabled capability supported by the Australian Government, and the University of Bath's Research Computing Group ( 10.15125/b6cd‐s854 ) for their support in this work. Open Access publishing facilitated by Australian National University, as part of the Wiley ‐ Australian National University agreement via the Council of Australian University Librarians. 3

FundersFunder number
National Cancer Institute
National Computational Infrastructure
University of Bath10.15125/b6cd‐s854
University of Bath
Australian Research CouncilDP210100454
Australian Research Council

    Keywords

    • Hydrides
    • Hypervalent compounds
    • Main group elements
    • Neutron diffraction
    • Supramolecular chemistry

    ASJC Scopus subject areas

    • General Chemistry
    • Catalysis
    • Organic Chemistry

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