Polyfluorocyloalkenes Part XI Perfluoro - bicyclo(3,3,0) oct-7(8)-ene, - bicyclo(4,3,0)-non-8(9)-ene and - bicyclo (4,4,0)-dec-9(10)-ene and some derivatives

Tetradecafluorobicyclo (4,3,0) non-8(9)-ene has been prepared by cobaltic fluoride fluorination of decafluoro indane. The reactivities of the double bonds in dodecafluorobicyclo (3,3,0) oct-7(8)-ene and hexadecafluorobicyclo (4,4,0) dec-9(10)-ene have been studied qualitatively by the use of chlorine, methanol, cobaltic fluoride, ammonia and dimethylamine and the derivatives so obtained have been characterised.