presence of CsF it is oxidized by chlorine monofluoride: F2C(SF3)2 + 2ClF F2C (SF4Cl)2 F2C(SF3)2 + AsF5 → F3SCF2SF2+AsF6− AsF5 will abstract only one fluoride under formation of the monocation. Another unusual carbon-sulfur-cation is formed from tetrafluoro-dithiethane and SbF5: This cyclic cation acts as a fluorinating agent even towards CFCl3.