Reversibility of homolytic aromatic substitution: the reaction of p-xylene with phenyl radicals
Abstract
The increase in the ratio of 4,4′-dimethylbibenzyl to 2,5-dimethylbiphenyl formed in the reaction of phenyl radicals with p-xylene with increasing temperature is interpreted as indicating that the formation of 1-phenyl-2,5-dimethylcyclohexadienyl radicals (1) is reversible.