Darstellung der Halogennitrilium-Salze XCNH+MF6− (X = Cl,Br, I; M = As,Sb) und der Trifluoracetonitrilium-Salze CF3CNH+MF6−

Preparation of the Halogenonitrilium Salts XCNH⁺MF₆^? (X = CI, Br, I; M = As, Sb) and the Trifluoroacetonitrilium Salts CF₃CNH⁺MF₆^? The halogenonitrilium salts XCNH⁺MF₆^? (X = CI, Br, I; M = As, Sb) are synthesized by protonation of cyanogen halides in the superacide system HF/MF₅ at low temperature. The synthesis of trifluoroacetonitrilium salts CF₃CNH⁺MF₆^? (M = As, Sb) is proceeded analogous with trifluoroacetonitrile. All salts are characterized by vibrational and NMR spectroscopy.