| Abstract: | Pentafluorosulfanylamines and Sulfanylammonium Salts . From the addition of HF to sulfurtetrafluorideimides N-alkylpentafluorosulfanylamines RNHSF5(2a, 2b: R=CH3, C2H5) are obtained in quantitative yield. N, N-dialkylpentafluorosuIfanylamines Et2NSF5(5a) and pip-SF5 (5b) are isolated from the reaction of the appropriate sulfurdifluoronitridearnides NSF2NR2 and HF/SF4. Protonation of the amines with the superacidic system HF/AsF5 gives stable pentafluorosulfanyl-ammonium salts SF5NHRR′. AsF6 (12: R = R′ = CH3; 14: R=R′=H; 10: R=CH3, R′ = H). Under the same conditions the adduct AsF5· NSF2CF(CF3)2 (15) forms a cation with hexacoordinated sulfur (trans-H3NSF4CF(CF3)2?AsF66: 16), while with Asp5 · NSF2NMe2 (17) the reaction stops at tetracoordination (HNSF2NMe2+AsF6 : 18). |
