| 摘要 |
A process for the preparation of compounds of the formula, F(CF2)aCC12CC12(CF2)bF where a and b are the same or different and are each an integer >/=1 (including the novel compound CF3CF2CC12CC12CF2CF3), which comprises chlorination in the presence of irradiation, of at least one compound of the formula, F(CF2)nCHxC13-x where n is an integer >/=1 and x is an integer </=3. There is also disclosed a process for utilizing the F(CF2)aCC12CC12(CF2)bF compounds to produce F(CF2)aCH2CH2(CF2)bF3 compounds which comprises contacting hydrogen and the F(CF2)aCC12CC12(CF2)bF compounds in the presence of a catalysis which includes at least one Group VIII transition metal. A further aspect of the invention is a novel group of compounds, F(CF2)aCC12CC12(CF2)bF, wherein a and b are the same or different and are each an integer from 2 to 10, particularly 3,3,4,4-tetrachloroperfluorohexane (i.e., CF3CF2CC12CC12CF2CF3), whose corresponding hydrofluorocarbons can be used as cleaning solvents.
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