1.3- triazenyl radicals intermediates

Also, the action of silyl radicals (or of organyl radicals) on silyl azides leads finally to amines and nitrogen (75). As reaction intermediates, triazenyl radicals—N—N—N—(e. g., MejSiN—N—NSiMc3) have been identified by ESR spectroscopy. 

Diazenyl radicals have also been detected in related systems. The rapid rearrangement of 1,3,5-triarylpentazadienes [equation (47)] involves intermediate triazenyl-diazenyl radical pairs, as indicated by the appearance in emission of the n.m.r. transitions of the -methyl protons of the starting material when Ar = Ar =j -CHg.C6H4 (Hol-laender and Neumann, 1970). The weak emission of benzene which accompanies a much more intense emission due to toluene when the 1,3-diaryltetrazene 6 decomposes in acetone at 50° has been interpreted... 

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