Neutron-induced reactions in iodobenzene

Abstract

The organic yields of radio-iodine produced by neutron irradiation of mixtures containing iodobenzene and iodine have been investigated; they were unaffected by a slow radiolytic exchange reaction and there was little evidence that they are influenced by thermal exchange occurring in the hot zone. The results can be explained by assuming that in such systems, phenyl radicals react to form iodonium radicals by addition to iodobenzene molecules. In the presence of benzene organic yields are reduced, possibly by reaction between phenyl radicals and benzene to form diphenyl compounds. This explanation is consistent with the absence of any self-scavenging effect in solutions of iodine in benzene.