14N Chemical shifts are reported for hydrazoic acid, certain organic and organoarsenic azides, and a number of metal azido-complexes. The shifts are related where possible to the electronic characteristics of the atom or group to which the azide is covalently attached and to the mode of attachment.No spin-spin coupling effects are observed but the shifts provide some evidence for molecular association or azide exchange in the compounds Me2AsN, and Et,AsN,.The covalent character of the metal-azide bond is demonstrated by the appearance of three distinct 14N n.m.r. signals for each of the azido-complexes studied.
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