[Xe(OTeF₅)(py^F)]⁺: a strong oxidizing xenonium(ii) teflate cation with N-donor bases

Herein we report on the formation of the adduct salts [Xe(OTeF5)(py(F))][Al(OTeF5)(4)] (py(F) = C5F5N, C5H3F2N) by abstraction of an -OTeF(5 )group from Xe(OTeF5)(2) with the Lewis superacid Al(OTeF5)(3) and subsequent adduct formation of the generated [XeOTeF5](+) cation with fluorinated pyridines. These salts represent the first xenonium cations with the weakly coordinating [Al(OTeF5)(4)](-) anion. The strong oxidizing property of these compounds is further assessed.