Preparation of HN3 Isotopomers

Methods used for the preparation of DN3 and N-labeled molecules are basically the same used in HN3 syntheses. DN3 was prepared by reacting NaN3 with D3PO4 [1, 2]. This gave a much better yield than the reaction of NaN3 with monodeuterated stearic acid [3] as described in [4]. Formation of DN3 by exchange between HN3 and excess liquid D2O was described in [5]. 

Mixtures of H NNN and HNN N were obtained from NaNN N and stearic acid [6] and from KNN N and H2SO4 [7]. A mixture of all N-labeled isotopomers of HN3 resulted from end- and central-labeled NaN3 and H3PO4 [1]. A mixture of D NNN and DNN N was obtained by gas-phase hydrogen exchange of labeled HN3 and excess D2O [8]. 

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