The Reactions Between Methyl Radicals

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Abstract
The reactions of methyl radicals with each other and with hydrogen molecules are reviewed. It is shown that the available evidence is consistent with the following statements: Methyl radicals combine only in three‐body collisions, the energy of activation of which may be as high as 22 kcal. Methyl radicals do not readily enter into two‐body reactions with hydrogen molecules. Most of the methyl radicals in an atmosphere containing a high percentage of hydrogen probably disappear by the reaction CH3+H2+CH3→2CH4, the energy of activation being probably 9±2 kcal. The reaction CH3+H2→CH4+H accounts at most for the disappearance of 1 in 104 methyl radicals, the energy of activation being ∼19 kcal.

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