Effect of olefins on the radiolysis of liquid cyclohexane. Part 3

Abstract

Effects of various olefins, notably propylene, 1-butene, 2-pentene, 2-methyl-2-butene and 2,3-dimethyl-2-butene, on the hydrogen yield from pure cyclohexane were investigated. In all cases an initial sharp reduction in G(H₂) was followed by a more gradual decrease until a nearly constant residual hydrogen yield is obtained. Observed differences in these residual yields are consistent with a charge-transfer mechanism. It is suggested that the probability of charge transfer from cyclohexane to olefins increases with increasing differences in ionization potentials. H₂-transfer from cyclohexane positive ions to olefins may also occur. The probability of this reaction increases with decreasing difference in ionization potentials of solvent and solute.