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The following triply 15N labelled azides CH3N3, C6H5N3, O2NC6H4N3, (O2N)3C6H2N3, NCN3, and (NCN3)3 were investigated by 15N NMR and partially by vibrational and 13C NMR specrtoscopy. The signals of the β- and γ-N atom show an overcrossing. 1J(15N -13C) is zero for the arylazides.
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Joachim Müller (1979) studied this question.
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