The synthesis and characterization of unique polyhalogen cations containing μ-bridging fluorine atoms are reported. The [Br F ] cation features a symmetric [F Br-μ-F-BrF ] bridge, whereas the [Br F ] contains asymmetric μ-F bridges. These fluoronium ions, obtained as [SbF ] salts, were investigated using Raman and F NMR spectroscopy, as well as single-crystal X-ray diffraction. Quantum chemical calculations were carried out for the gas-phase cations as well as for the solid-state compounds. Population analyses show the μ-F atoms to possess the most negative partial charge within the cations.
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