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

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‐tert‐butyl‐9,9‐dimethyl‐xanthene)), where the [SiH6]2− anion is stabilised within a su...

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Bibliographic Details
Published in:Chemistry : a European journal 2024-05, Vol.30 (25), p.e202400662-n/a
Main Authors: Huo, Ryan, Armstrong, Alicia J., Nelmes, Gareth R., Lawes, Douglas J., Edwards, Alison J., McMullin, Claire L., Hicks, Jamie
Format: Article
Language:English
Subjects:
Acetonitrile
Anions
Assembly
Azo compounds
Benzaldehyde
Carbon monoxide
Hydrides
Hypervalent compounds
Main group elements
Neutron diffraction
Room temperature
Supramolecular chemistry
Xanthene
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Summary: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‐tert‐butyl‐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. Bring solid state chemistry into solution. Using a supramolecular assembly to mimic the coordination environment of [SiH6]2− in the solid‐state, a molecular [SiH6]2− complex that is stable in solution is reported.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202400662