Summary Reaction of 2, 2-dimethyl-3-phenyl-2 H-azirine (1) with diiron-enneacarbonyl yields as an insertion product, and in addition to other products, the diiron-hexacarbonyl complex 2 (Scheme I), whose structure was derived from spectral data, in particular I3C- NMR.-data (Table 1). With trimethylamine oxide in benzene, 2 is converted into the urea derivative 3, and yields with cerium (1V) ammonium nitrate the nitrate 4 (Scheme I). The ...