Unexpected Reactions of (Heptafluoro-1,4-cyclohexadien-1-yl)xenon(II) Hexafluoroarsenate with Sodium Fluoride and Antimony Pentafluoride

The reactivity of (heptafluoro-1,4-cyclohexadien-1-yl)xenon(ii) hexafluoroarsenate 1 towards a fluoride donor and acceptor has been investigated; the interaction of 1 with NaF led to perfluoro-3-methylenecyclopentene and xenon. No dication [C₆F₆Xe]²⁺ was detected by ¹⁹F NMR spectroscopy when [1-Xe ⁺ -1,4-C₆F₇] [AsF₆]^– was treated with SbF₅–SO₂, SbF₅–SO₂FCI or neat SbF₅.