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September 10, 2025Nature ChemistryOpen Access

Isolation of halogen-substituted silylium ions

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Research reveals stronger Lewis acidity in halogen-substituted silylium ions, suggesting potential in synthetic transformations like waste recycling.

Halogen-substituted silylium ions exhibit higher Lewis acidity than trialkyl counterparts, enhancing their synthetic utility.
Quantitative assessments using density functional theory confirm significant differences in fluoride ion affinities between ion types.
Protolysis of halosilanes in superacid conditions leads to effective generation of these elusive intermediates.
The study characterizes all halogen-substituted variants of silylium ions, paving the way for future applications.

Randt et al. (2025) studied this question.

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Research reveals stronger Lewis acidity in halogen-substituted silylium ions, suggesting potential in synthetic transformations like waste recycling.