Reaction of AsCl3 with activated sodium azide in CFCl3 gave As(N3)3 in quantitative yield. Reaction of [AsCl4][AsF6] in liquid SO2 led to [As(N3)4][AsF6]. The identity of both new compounds was established by 14N NMR, IR and Raman spectroscopy and in addition for As(N3)3 by microanalysis and mass spectrometry. The heat of decomposition of [As(N3)4][AsF6] was estimated on the basis of a Born–Haber energy cycle.
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Klapötke et al. (1995) studied this question.
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