Trifluoropropynylxenon(II) tetrafluoroborate [CF3CCXe][BF4] – isolation of an alkynylxenon(II) compound for the first time

The salt [CF3CCXe][BF4] was prepared as neat compound by the reaction of the hitherto unknown alkynyldifluoroborane CF3CCBF2 with XeF2 in 1,1,1,3,3-pentafluoropropane (PFP) at –45 °C in 59% yield. [CF3CCXe][BF4] was unambiguously characterised by multinuclear NMR spectroscopy in anhydrous HF (aHF) solution