Ion-molecule reactions in the vapour-phase radiolysis of 1-chloropropane, with cyclohexene as an additive

1-Choloropropane has been irradiated in the presence of cyclohexene and the formation of hydrogen chloride and of products derived from cyclohexene has been studied as a function of the concentration of this additive. The irradiations, which were performed with accelerated electrons, were characterized by very high absorbed dose rates. Under such experimental conditions, transfer of excitation energy and radical addition to cyclohexene appear to be only of minor importance. The formation of products derived from cyclohexe is initiated predominantly by ion-molecule reactions between cyclohexene and the positive 1-chloropropane ions. The mechanisms of the subsequent reactions are discussed.