Abstract
Hexafluoropropene trimers, perfluoro-3-ethyl-2,4-dimethylpent-2-ene (1) and perfluoro-3-isopropyl-4-methylpent-2-ene (2) reacted with fluorine under u.v. irradiation to give the new and highly branched perfluoroalkanes perfluoro-2,3,3,4-tetramethylpentane (7) and perfluoro-2,3,4- trimethylpentane (8) through a mechanism involving the elimination–readdition of CF3 groups. Compound (7), which is very bulky, can be easily cleaved at <200 °C to give two perfluoro radicals capable of initiating the polymerization of vinylic monomers.
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