gives 1,3-dimethylpyrazolobenzotriazole (6, by electrophilic cyclization of singletnitrene 14) or, in the presence of diethylamine, aminoazepine 8 (by addition of the nucleophile and rearrangement). At lower temperatures, the yield of these products decreases and the azo derivative 9 (from the dimerization of tripletnitrene 34) as well as products from intramolecular radical cyclization (again via