| 摘要 |
TELOMERS PREPARED FROM CHLOROTRIFLUOROETHYLENE AND 1,1-DIBROMO-1-CHLOROTRIFLUOROETHANE Telomers are prepared by reacting chlorotrifluoroethylene with l,l-dibromo-l-chlorotrifluoroethane (CBr2C1CF3) in the presence of a redox catalyst system comprising a reducible metal compound selected from the group consisting of FeC13, FeBr3, Fe2(SO4)3, CuBr2, CuC12, TiC14, VC13, and NiC12, and a reducing agent selected from the group consisting of Fe, Ni, Cu, Ti, V and benzoin. Alternatively, the metal compound can also be used in its reduced form without a reducing agent. Suitable reduced metal compounds include FeC12, FeBr2, FeSO4, CuBr and CuCl. The preferred catalyst system is ferric chloride and nickel. The telomers of this invention are useful for preparing non-flammable hydraulic fluids. |
