(1) PJ Grisdale, BE Babb, JC Doty, TH Regan, DP Maier, and J. LR Williams, J. Organometal. Chem., 14, 63 (1968). used earlier. Previously we considered two primary photochemical processes:(1) the generation of a phenyl radical (R.) by homolytic fission of a phenyl boron bond in the" ate" complex 1;(2) the generation of a mesityl radical by an analogous process. Path a based on process 1 is shown in Scheme I2 and reveals that in ...