Abstract: Members of a new class of perfluoroalkyldiazomethanes (Rf) $2 N2 and the first member of the class of perfluoroalkyldiazirines have been prepared by lead tetraacetate oxidation of the corresponding hydrazones and diaziridine, respectively. The chemistry of these compounds has been investigated with emphasis on the formation and chemistry of carbenes (R&C:, which are sufficiently electrophilic to add to benzene. The ultraviolet ...