Bis pentafluorosulfanyl amine, SF5 2NH

When NSF3 is fluorinated at low temperature with elemental fluorine, i T-(pentafluorosulfanyl)iminosulfur tetrafluoride is formed in —50% yield (229). 

The NSF4 group in SF6NSF4 functions both as a fluoride ion donor and as a fluoride ion acceptor, e.g., 

Bis(pentafluorosulfanyl)amine is prepared in quantitative yield by the addition of hydrogen fluoride to SF5NSF4 (214). It is a colorless liquid that boils at 60.4°C, and it is stable in glass at room temperature. At elevated temperatures in the presence of alkali metal fluorides, it loses HF and forms SF5NSF4. It is a weak acid, which with large cations forms stable salts such as Ph4P+N(SF5)2 (229). 

N-Pentafluorosulfanyl chloroimine, SF5N=CC12, was first synthesized in 30% yield by Tullock et al. (8) from the photolytically induced reaction of SF5C1 with C1CN. Other derivatives are obtained by the irradiation of SF5C1 and RfCN. 

SF5N=C(C1)N(C2H5)2 + NaOCH3 SF6N=C(OCH3)N(C2H6)2 

---