期刊
INORGANIC CHEMISTRY
卷 59, 期 23, 页码 17671-17677出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c02917
关键词
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资金
- Ludwig-Maximilian University of Munich (LMU)
- Office of Naval Research (ONR) [ONR N00014-19-1-2078]
- Strategic Environmental Research and Development Program (SERDP) [W912HQ19C033]
- Deutsche Forschungsgemeinschaft [KL 636/11-1, 636/11-2]
Hydrazoic acid (HN3) is the simplest covalent azide, potentially explosive, and strongly toxic with both a low boiling and a low melting point (309 and 193 K, respectively). The monoclinic structure, recently solved by X-ray single-crystal diffraction at 100(2) K, is built up by tetramers (HN3)(4) in unique pseudotetragonal layers with N-H center dot center dot center dot N hydrogen bonds, but with only weak van der Waals bonds between them. As also observed in 2H-graphite, nearly planar layers are stacked parallel to (001) with the sequence A, B, ..., A, B. We report here on a polycrystalline sample of HN3 that retains the monoclinic structure between 55(5) and 180(5) K with nearly linear increase of the lattice parameters a and b, but with steeper, partly nonlinear increase for the lattice parameter c. Near the melting point additional reflections are observed in the diffractograms which may indicate structural stress in the planar layers.
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