Results are presented on the yields of gaseous products resulting from recoil reactions of C11 in various C6 hydrocarbons: benzene, n-hexane, 2-methylpentane, and 2,2-dimethylbutane. The C11 was produced by the C12 (γ, n)C11 reaction in the target molecule. The radiation time and dose were varied, and iodine was added as a scavenger. Comparison was made with similar results on cyclohexane. In all cases, acetylene is the most abundant product, but as branching in the molecule increases, other products, principally ethylene and ethane, become increasingly important. The results are in agreement with a mechanism involving the insertion of an energetic C11 or C11H group into a C–H bond, followed by bond rupture in the resulting intermediate.

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