MARCH 1961 STERIC EFFECTS IN THE QOMBERQ REACTION 731 derived from the phenylation of substituted aromatic solvents. A number of studies have also been reported in which pura-substituted phenyl radicals were used rather than phenyl radical~.~ n~ Even fewer quantitative studies have been reported describing the effect of substitution ortho to the radical site. 6 In the present work we report the behavior of several ortho-substituted ...