Mixtures of benzophenone with propanol-2 have been irradiated with cobalt-60 gamma raps. It has been found that the yield of hydrogen from propanol-2 is very sensitive to benzophenone addition; 1% benzophenone lowers G(H/ sub 2/) from 3.0 to 2.0. Addition of benzophenone also lowers the yield of methane from propanol-2. It is concluded that benzophenone probably functions principally as a hydrogen atom scavenger. It was also observed that radiolysis of these mixtures produced benzpinacol with a G of 6.60 (as semi-pinscol units) concurrent with a disappearance of benzophenone with a G of 7.2 and the formation of acetone with a G of 9.1. It is concluded that hydrogen transfer beteen the components of a system composed of a ketone molecule solvated with carbinol molecules is sn important factor in the formation of the pinacol. (auth)