Radiolysis of Propane-d8 in the Presence of Organic Compounds Other Than Hydrocarbons

The gas phase radiolysis of propane‐d₈ has been investigated in the presence of dimethylmercury, azomethane, acetone, methyliodide, methanol, nitromethane, and methylamine. The cross section of the hydride‐transfer reaction $${\mathrm{C}}_2{\mathrm{D}}_5^{+}+\mathrm{RH}\to {\mathrm{C}}_2{\mathrm{D}}_5\mathrm{H}+{\mathrm{R}}^{+}$$ is, in all cases, at least 10 times smaller than that of the reaction $${\mathrm{C}}_2{\mathrm{D}}_5^{+}+{\mathrm{C}}_3{\mathrm{D}}_8\to {\mathrm{C}}_2{\mathrm{D}}_6+{\mathrm{C}}_3{\mathrm{D}}_7^{+}.$$ Evidence for the occurrence of the proton‐transfer reaction $${\mathrm{C}}_2{\mathrm{D}}_5^{+}+\mathrm{RH}\to {\mathrm{C}}_2{\mathrm{D}}_4+{\mathrm{RHD}}^{+}$$ has been obtained. For the mixtures containing methanol, the cross section of this proton‐transfer reaction is about 50 times that of the hydride‐transfer process. Approximate values of G (CH₃⁺) have been determined for most of the additives.