in hydrogen fluoride HF (liquid); Argon atmosphere, fluorocarbon polymer tube, (20°C, 20 h); decantation, washing (HF), removememt of volatiles;

in sulfur dioxide under N2; Al-complex and NOSbF6 were reacted in SO2 at -196°C, stirred at room temp. for 1 h; filtered, SO2 was slowly removed, CH2Cl2 was condensed, warmed to -20°C with stirring, filtered; elem. anal.;

in hydrogen fluoride HF (liquid); under dry Ar in dry box; LiF (0.92 mmol) loaded into FEP react. vessel; SbF5 (8.15 mmol) and anhyd. HF condenced (77 K); stirred (11 d, room temp.); volatiles pumped off (room temp., few h);