3,: 3-Diphenyl-l-nitrocyclohexene was synthesized for photochemical study in order to compare nitro n--K* photochemistry with carbonyl nr* reactivity. Both direct and sensitized irradiations in benzene gave rise to trans-5, 6-diphenyl-l-nitrobicyclo [3. l. 0] hexane; the preference for formation of trans product was shown to be kinetic. Additionally, the photolysis afforded 3, 3-diphenylcyclohexanone. Quantum efficiencies were determined, and these ...
