Free radical substitution in aliphatic compounds. Part 32. The reaction of trifluoromethyl radicals with butane, 1-fluorobutane, and 1,1,1-trifluoropentane

Trifluoroiodomethane has been photolysed in the presence of butane, 1-fluorobutane, and 1,1,1-trifluorobutane in the gas phase. Using literature data for the attack of trifluoromethyl radicals on butane, Arrhenius parameters have been determined for the attack of trifluoromethyl radicals at each site in the substituted butanes. In an attempt to obtain similar data for methyl radicals, azomethane was photolysed in the presence of excess of methyl iodide. Although qualitative data concerning the attack of 1-substituted butanes by methyl radicals were obtained it was not possible to obtain good quantitative data by this technique.