in further solvent(s) solid XeF2 added in small portions to a cold (-30°C) stirred soln. of trans-C4F9CF=CFBF2 in 1,1,1,3,3-perfluorobutane; soln. stirred at -30°C for 1 h and then kept for 30 min without stirring; not isolated; detected by (19)F-NMR;

in dichloromethane solid XeF2 added in one portion to a cold (-45°C) stirred emulsion of trans-C4F9CF=CFBF2 in CH2Cl2; soln. stirred at -40°C for 3 h; soln. phase decanted from the oil phase; treatment of the oil with cold (-40°C) anhydrous HF; not isolated; detected by (19)F-NMR;

in further solvent(s) solid XeF2 added in small portions to a cold (-30°C) stirred soln. of trans-C4F9CF=CFBF2 in 1,1,1,3,3-perfluorobutane; soln. stirred at -30°C for 1 h and then kept for 30 min without stirring; not isolated; detected by (19)F-NMR;

in further solvent(s) solid XeF2 added in small portions to a cold (-30°C) stirred soln. of trans-C4F9CF=CFBF2 in 1,1,1,3,3-perfluorobutane; soln. stirred at -30°C for 1 h and then kept for 30 min without stirring; not isolated; detected by (19)F-NMR;