Syntheses and Characterizations of the Mixed Noble‐Gas Compounds, [FKrIIFXeIIF][AsF6]⋅0.5 KrIIF2⋅2 HF, ([KrII2F3][AsF6])2⋅XeIVF4, and XeIVF4⋅KrIIF2

Abstract Reaction of [XeF][AsF 6 ] with excess KrF 2 at −78 °C in anhydrous HF (aHF) solvent has yielded the first mixed Kr II /Xe II noble‐gas compound, [FKrFXeF][AsF 6 ] ⋅0.5 KrF 2 ⋅2 HF, a salt of the [FKrFXeF] + cation. The potent oxidative fluorinating properties of Kr II fluoride species resulted in oxidation of Xe II to Xe IV in aHF at −60 °C to form the mixed Kr II /Xe IV cocrystals, ([Kr 2 F 3 ][AsF 6 ]) 2 ⋅XeF 4 and XeF 4 ⋅KrF 2 . …