Interest in fluoro analogs of polycyclic aromatic compounds stems from the hope that they may help evolve a model of chemically induced carcinogenicity.'We have synthesized the title compounds by photocyclieation of the appropriately fluorinated diarylethylene~.~-~ q $ WFT An intrinsic expectation of the synthetic approach to 1 and 2 was that the photodehydrogenation or photo-F
