| 摘要 |
Processes are disclosed for producing hydrohaloolefins having the formula CF2=C(CH2RF)CF3, the formula FRCF=C(CH2RF)CF3 or the formula FRCF=C(CH2RF)(CF2RF) wherein each R is a difinctional group of the formula -C2F2XY- where X and Y are attached to the same carbon, each X is H, Br, Cl or F and each Y is F or CF3. The processes involve reacting (CF3)2C=CH2 or certain olefinic adducts thereof with a second olefm of the formula CF2=CXY in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride. Also disclosed is 1,1,2,2,-tetrafluoro-3,3-bistrifluoromethylcyclobutane and a process for its production which involves reacting (CF3)2C=CH2 with CF2=CF2 in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride. Also disclosed are olefins of the formula FRCF=C(CH2RF)CF3, FRCF=C(CH2RF)(CF2RF) or CF2=C(CH2R1F.)CF3 (R, X and Y are defined as above) wherein R1 is -C2F2X(CF3)- where X and (CF3) are attached to the same carbon or -C2F3X1- wherein X1 is H, Br or Cl.
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