Nitryl azide

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Structural formula
Structure of nitryl azide
General
Surname Nitryl azide
other names
  • Tetra nitrogen dioxide
  • Tetra nitrogen oxide
Molecular formula N 4 O 2
External identifiers / databases
CAS number 40006-84-6
Wikidata Q15632905
properties
Molar mass 88.03 g mol −1
safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nitryl azide ( tetra nitrogen dioxide ) is an unstable nitric oxide that can be seen as both an inorganic covalent azide and a nitryl compound . The nitrogen content in the molecule is 63.65%.

Presentation and extraction

A first indication of the formation of the compound from nitronium tetrafluoroborate and lithium azide in acetonitrile or carbon tetrachloride at low temperatures was found as early as 1973. Reactions of nitryl chloride with azides such as trimethylsilyl azide or Titandicyclopentanyldiazid yielded instead of target compound is preferably the chlorine azide ClN 3 . The reaction of sodium azide with nitryl fluoride led to explosive decomposition of the reaction mixture even at −115 ° C. Nitryl azide was prepared by reacting nitronium hexafluoroantimonate with sodium azide in liquid carbon dioxide at −50 ° C under pressure, whereby the compound was only detected spectroscopically and not isolated.

Synthesis of nitryl azide

properties

Nitryl azide is so unstable that it cannot be presented in pure form. The Raman spectrum measured in solution agrees with that determined by means of ab initio calculation. The compound easily breaks down to form nitrous oxide , whereby a cyclical intermediate stage is postulated. A quantum chemical ab initio calculation resulted in a strongly exothermic heat of reaction of −250 kJ mol −1 for the decay .

Response of nitryl azide

Individual evidence

  1. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  2. ↑ a b Doyle, MP; Maciejko, JJ; Busman, SC: Reaction between azide and nitronium ions, formation and decomposition of nitryl azide in J. Am. Chem. Soc. 95 (1973) 952-953, doi : 10.1021 / ja00784a069 .
  3. ↑ a b c d e Klapötke, TM ; Schulz, A .; Tornieporth-Oetting, C .: Studies of the Reaction Behavior of Nitryl Compounds Towards Azides: Evidence for Tetranitrogen Dioxide, N 4 O 2 in Chem. Ber. 127 (1994) 2181-2185, doi : 10.1002 / cber.1491271115 .