The addition of methyl radicals to hexafluoropropylene

Abstract

The addition of methyl radicals to hexafluoropropylene has been studied over the temperature range 8 lo-203"C using a mass-balance technique involving the photolysis of biacetyl in the presence of hexafluoropropylene-isobutane mixtures. For the reaction CH3 + C3F6 + CH3CsFs the rate constant is given by the equation 6200 f 110 2.303RTlog k (in mole-' cm3 sec-l) = (12.04 f 0.06) -The result suggests that methyl radicals are very unselective in their behavior reacting with tetrafluoroethylene and hexafluoropropylene at similar rates. This is in marked contrast to the behavior of oxygen atoms with these olefins.