Organoxenonium salts cation

Reactions of organoxenonium salts [RXe][EFn+)] with Lewis acids do not result in transformation of the organo group of the cation [RXe]+ (6), but rather give rise to fluoride abstraction from the counteranion [EFn+i]. For example, organoxenonium fluoroborates were converted into [EF6]" salts by using arsenic or antimony pentafluoride or their adducts, EFj L (eqs 9, 10) (22, 30). 

---