hydrogenchloride 1.) cyclohexane, 25 deg C, irradiation, 24 h, 2.) benzene, acetic acid, reflux, 30 h; Yield given. Multistep reaction. Yields of byproduct given;

in cyclohexane T=25°C; 24 h; Irradiationdifference in activation energy for phenyl and 2-biphenylyl groups to migrate; Thermodynamic dataMechanism;