Chemistry:Nitrosylazide
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3D model (JSmol)
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PubChem CID
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| N 3NO | |
| Molar mass | 72.027 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Nitrosyl azide is a highly labile nitrogen oxide with chemical formula N
3NO.
Synthesis
Nitrosyl azide can be synthesized via the following reaction of sodium azide and nitrosyl chloride at low temperatures:
Properties
Below −50 °C, nitrosyl azide exists as a pale yellow solid. Above this temperature, it decomposes into nitrous oxide N
2O and molecular nitrogen N
2:[1]
Characterization of the compound with IR and Raman spectroscopy show absorption bands that agree well with calculated values for a trans-structure.[1][2] Quantum chemical calculations show a cis-form higher in energy by 4.2 kJ/mol and an aromatic ring form that is more stable by 205 kJ/mol. However, the cyclization to the ring form would have to surpass the 205 kJ/mol activation energy barrier require to bend the azide group, which might explain why nitrosyl azide is stable enough to be isolated at low temperature.[1]
References
- ↑ 1.0 1.1 1.2 Schulz, Axel; Tornieporth-Oetting, Inis C.; Klapötke, Thomas M. (1993). "Nitrosyl Azide, N4O, an Intrinsically Unstable Oxide of Nitrogen" (in en). Angewandte Chemie International Edition in English 32 (11): 1610–1612. doi:10.1002/anie.199316101. ISSN 0570-0833.
- ↑ Lucien, Harold W. (1958). "The Preparation and Properties of Nitrosyl Azide" (in en). Journal of the American Chemical Society 80 (17): 4458–4460. doi:10.1021/ja01550a004. ISSN 0002-7863.
- Cotton, F. Albert & Geoffrey Wilkinson (1999). Advanced Inorganic Chemistry (6th ed.). New York: John Wiley & Sons. p. 331. ISBN 0-471-19957-5.
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