Nitrogen oxide

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

## Contents

* 1 Charge-neutral
* 2 Anions
* 3 Cations
* 4 Atmospheric sciences
* 5 Stability
* 6 See also
* 7 References

## Charge-neutral

* Nitric oxide (NO), nitrogen(II) oxide, or nitrogen monoxide
* Nitrogen dioxide (NO
2), nitrogen(IV) oxide
* Nitrogen trioxide (NO
3), or nitrate radical
* Nitrous oxide (N
2O), nitrogen(0,II) oxide
* Dinitrogen dioxide (N

2), nitrogen(II) oxide dimer
* Dinitrogen trioxide (N

3), nitrogen(II,IV) oxide
* Dinitrogen tetroxide (N

4), nitrogen(IV) oxide dimer
* Dinitrogen pentoxide (N

5), nitrogen(V) oxide, or nitronium nitrate [NO
2]+
[NO
3]−

* Nitrosylazide (N
4O), nitrogen(−I,0,I,II) oxide
* Oxatetrazole (N
4O)
* Trinitramide (N(NO

3 or N

6), nitrogen(0,IV) oxide

## Anions

* Nitroxide (O=N−

* Nitrite (O=N–O−
or NO−

* Nitrate (NO−

* Peroxynitrite (O=N–O–O−
or NO−

* Peroxynitrate (O
2N–O–O−
or NO−

* Orthonitrate (NO3−
4, analogous to phosphate PO3−

* Hyponitrite (−
O–N=N–O−
or N
2O2−

* Trioxodinitrate or hyponitrate ([O
2NNO]2− or [N

3]2−)
* Nitroxylate ((−
O–)
2N–N(–O−

2 or N
2O4−

* Dinitramide (O
2N–N−
–NO
2 or N
3O−

## Cations

* Nitrosonium (N≡O+
or [NO]+

* Nitronium (O=N+
=O or [NO
2]+

## Atmospheric sciences

In atmospheric chemistry:

* NO {x} (or NOx) refers to the sum of NO and NO
2.[1][2]
* NO {y} (or NOy) refers to the sum of NO
x and all oxidized atmospheric odd-nitrogen species (e.g. the sum of NO
x, HNO
3, HNO
2, etc.)
* NO
z (or NOz) = NO
y − NO

* Nitric oxide, NO

* Nitrogen dioxide, NO

* Nitrous oxide, N

* Dinitrogen trioxide, N

* Dinitrogen tetroxide, N

* Dinitrogen pentoxide, N

* Trinitramide, N

## Stability

Due to relatively weak N–O bonding, all nitrogen oxides are unstable with respect to N
2 and O
2, which is the principle behind the catalytic converter and prevents the combustion of the atmosphere.

## See also

* Nitrate
* Nitrogen oxide sensor
* Sulfur nitrides, which are valence isoelectronic with nitrogen oxides

## 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, https://archive.org/details/atmosphericchemi0000sein

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