Group 6 Oxyfluoro‐Anion Salts of [XeF5]+ and [Xe2F11]+: Syntheses and Structures of [XeF5][M2O2F9] (M=Mo, W), [Xe2F11][M′OF5] (M′=Cr, Mo, W), [XeF5][HF2]⋅CrOF4, and [XeF5][WOF5]⋅XeOF4

The reactions of the fluoride-ion donor, XeF₆ , with the fluoride-ion acceptors, M'OF₄ (M'=Cr, Mo, W), yield [XeF₅ ]⁺ and [Xe₂ F₁₁ ]⁺ salts of [M'OF₅ ]^- and [M₂ O₂ F₉ ]^- (M=Mo, W). Xenon hexafluoride and MOF₄ react in anhydrous hydrogen fluoride (aHF) to give equilibrium mixtures of [Xe₂ F₁₁ ]⁺ , [XeF₅ ]⁺ , [(HF)_n F]^- , [MOF₅ ]^- , and [M₂ O₂ F₉ ]^- from which the title salts were crystallized. The [XeF₅ ][CrOF₅ ] and [Xe₂ F₁₁ ][CrOF₅ ] salts …