Nitrosyl Azide on:
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Nitrosyl azide is a highly labile
Characterization of the compound with IR and 
nitrogen oxide Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds:
Charge-neutral
*Nitric oxide (NO), nitrogen(II) oxide, or nitrogen monoxide
*Nitrogen dioxide (), nitrogen(IV) oxide
* Nitrogen trioxide (), or n ...
with chemical formula .
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 and molecular nitrogen : :
Characterization of the compound with IR and Raman spectroscopy
Raman spectroscopy () (named after Indian physicist C. V. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed. Raman sp ...
show absorption bands that agree well with calculated values for a ''trans''-structure. 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.
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References