“…(3) R. D. Chambers, "Fluorine In Organic Chemistry", Wiley, New York, 1973, pp 142-144. (4) Though its dimer and numerous trapping products are well characterized, perchlorocyclopentadienone remains unknown; W. H. Dietsche, Tetrahedron Lett., 201 (1966), and references contained therein; M. Akhtar, D. M. Bratby, J. C. Chadwick, and G. I. Fray, Tetrahedron, 32, 2265Tetrahedron, 32, (1976.…”