Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds:

Charge-neutral

Anions

NameFormula
NitroxideO=N
NitriteO=N−O or NO2
NitrateNO3
PeroxynitriteO=N−O−O or NO3
PeroxynitrateO2N−O−O or NO4
OrthonitrateNO3−4, analogous to phosphate PO3−4
HyponitriteO−N=N−O or N2O2−2
Trioxodinitrate or hyponitrate[O2NNO]2− or [N2O3]2−
Nitroxylate(O−)2N−N(−O)2 or N2O4−4
DinitramideO2N−N−NO2 or N3O4

Cations

Atmospheric sciences

In atmospheric chemistry:

  • NOx (or NOx) refers to the sum of NO and NO2.[1][2]
  • NOy (or NOy) refers to the sum of NOx and all oxidized atmospheric odd-nitrogen species (e.g. the sum of NOx, HNO3, HNO2, etc.)
  • NOz (or NOz) = NOyNOx


Stability

Due to relatively weak N–O bonding, all nitrogen oxides are unstable with respect to N2 and O2, which is the principle behind the catalytic converter, and prevents the oxygen and nitrogen in the atmosphere from combusting.

See also

References

  1. United States Clean Air Act, 42 U.S.C. § 7602
  2. Seinfeld, John H.; Pandis, Spyros N. (1997), Atmospheric Chemistry and Physics: From Air Pollution to Climate Change, Wiley-Interscience, ISBN 0-471-17816-0
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