“…In that system, no nitrene isomers analogous to (7) or (9) were found, but otherwise the ordering of the isomers, using the same labelling as for the isomers of CF,N, is, by MNDO: (5), (6), (1), (2), (3), (4), (8); and by HF/3-21G calculation at the 3-21G level: ( 5 ) , (61, (8), (11, (21, ( 31, (4).…”