Claims
- 1. A method of preparing a fluorinated alkylene compound comprising the steps of:
- carrying out the addition reaction of a perfluoroalkyl iodide having the formula R(CF.sub.2).sub.n I, wherein R is --I or --CF.sub.3 and n is a whole number from 5 to about 20, inclusive, and HC.tbd.CSi(CH.sub.3).sub.3 to form R'(CF.sub.2).sub.n --CH.dbd.CISi(CH.sub.3).sub.3, wherein R' is (CH.sub.3).sub.3 SiIC.dbd.CH-- or --CF.sub.3 ; and
- subjecting the R'(CF.sub.2).sub.n --CH.dbd.CISi(CH.sub.3).sub.3 to dehydrohalogenation with a suitable base to obtain R"(CF.sub.2).sub.n --C.tbd.CSi(CH.sub.3).sub.3, wherein R" is --CF.sub.3 or (CH.sub.3).sub.3 SiC.tbd.C--.
- 2. A method in accordance with claim 1 wherein said addition reaction is carried out in the presence of a free radical catalyst and the dehydrohalogenation of the R'(CF.sub.2).sub.n --CH.dbd.CISi(CH.sub.3).sub.3 is carried out under dry conditions.
- 3. A method in accordance with claim 2 in which R is --I, R' is (CH.sub.3).sub.3 SiIC.dbd.CH-- and R" is (CH.sub.3).sub.3 SiC.tbd.C--.
- 4. A method in accordance with claim 2 in which R, R' and R" are each --CF.sub.3.
- 5. A method of preparing a fluorinated alkylene compound comprising the step of reacting a perfluoroalkyl iodide having the formula R(CF.sub.2).sub.n I, wherein R is --I or --CF.sub.3 and n is a whole number from 5 to about 20, inclusive, and bis(trimethylsilyl)acetylene to obtain a fluorinated trimethylsilylacetylene having the formula R'(CF.sub.2).sub.n --C.tbd.CSi(CH.sub.3).sub.3, wherein R' is --CF.sub.3 or (CH.sub.3).sub.3 SiC.tbd.C--.
- 6. A method in accordance with claim 5 in which R is --I and R' is (CH.sub.3).sub.3 SiC.tbd.C--.
Government Interests
The Government has rights in this invention pursuant to Contract N00014-78-C-0520 awarded by the Department of the Navy.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
301338 |
Jun 1971 |
SUX |