Perfluoro(alkylbenzocycloalken-1-yl) cations were generated in a SbF 5 −SO 2 ClF medium from perfluorinated indane and benzocyclobutene derivatives containing perfluoroalkyl groups in the alicyclic fragment. The cations exist in equilibrium with their precursors. Adding SO 2 Cl 2 to the system led to the formation of polyfluoroalkylbenzocycloalken-1-yl cations with a chlorine substituent at the cationic center. The structures of the cations were determined by 19 F and 13 C NMR spectroscopy and confirmed by the structures of perfluoroketones formed on their hydrolysis.
- perfluoroalkyl group
- FLUORINE-CONTAINING CARBOCATIONS