The Reaction of Methyl Radicals with Some Halogenated Methanes

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Abstract
The reactions of methyl radicals formed by the photolysis of acetone with several halogenated methanes have been investigated between 110°C and 220°C. The activation energies of these reactions have been determined relative to the activation energy of the combination of methyl radicals and are found to be (in kcal): methyl fluoride 8.7, methylene fluoride 6.2, methyl chloride 9.4, methylene chloride 7.2, chloroform 5.8, methyl bromide 10.1, methylene bromide 8.7. The steric factors of the reactions are in the range 10−2−10−4.