Photochemical addition of benzene to cyclopentene - American

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Photochemical Addition of Benzene to Cyclopen tene V. Y. Merritt, J. Cornelisse, and R. Srinivasan* Contributionfrom the IBM Thomas J . Watson Research Center, Yorktown Heights, New York 10598. Received February 15,1973 Abstract: Irradiation of solutions of benzene in cyclopentene at 254 nm led to the formation of cyclopentene dimers and two 1,3 photoadducts of benzene to cyclopentene. The major adduct (IV) was shown to have the structure 3,7-endo-tetracyclo[6.3.0.0z2 l1.Oa