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 ({{chem2|NO2}}), nitrogen(IV) oxide
Nitrogen trioxide ({{chem2|NO3}}), or nitrate radical
Nitrous oxide ({{chem2|N2O}}), nitrogen(0,II) oxide
Dinitrogen dioxide ({{chem2|N2O2}}), nitrogen(II) oxide dimer
Dinitrogen trioxide ({{chem2|N2O3}}), nitrogen(II,IV) oxide
Dinitrogen tetroxide ({{chem2|N2O4}}), nitrogen(IV) oxide dimer
Dinitrogen pentoxide ({{chem2|N2O5}}), nitrogen(V) oxide, or nitronium nitrate {{chem2|[NO2]+[NO3]−}}
Nitrosyl azide ({{chem2|N4O}}), nitrogen(−I,0,I,II) oxide
Nitryl azide ({{chem2|N4O2}})
Oxatetrazole ({{chem2|N4O}})
Trinitramide ({{chem2|N(NO2)3}} or {{chem2|N4O6}}), nitrogen(0,IV) oxide

Anions

class="wikitable" !Name!!Formula
Nitroxide	{{chem2\|O\dN−}} or {{chem2\|NO-}}
Nitrite	{{chem2\|O\dN\sO-}} or {{chem2\|NO2-}}
Nitrate	{{chem2\|O2N\sO-}} or {{chem2\|NO3-}}
Peroxynitrite	{{chem2\|O\dN\sO\sO-}} or {{chem2\|NO3-}}
Peroxynitrate	{{chem2\|O2N\sO\sO-}} or {{chem2\|NO4-}}
Orthonitrate	{{chem2\|+N(\sO−)4}} or {{chem2\|NO4(3-)}}
Hyponitrite	{{chem2
O\sN\dN\sO-}} or {{chem2\|N2O2(2-)}}
Trioxodinitrate or hyponitrate	{{chem2\|O\dN\sN(\sO−)2}} or {{chem2\|N2O3(2-)}}
Nitroxylate	{{chem2\|(-O\s)2N\sN(\sO-)2}} or {{chem2\|N2O4(4-)}}
Dinitramide	{{chem2\|O2N\sN-\sNO2}} or {{chem2\|N3O4-}}

Cations

Nitrosonium ({{chem2|N\tO+}} or {{chem2|[NO]+}})
Nitronium ({{chem2|O\dN+\dO}} or {{chem2|[NO2]+}})

Atmospheric sciences

In atmospheric chemistry:

NOx (or NOx) refers to the sum of NO and nitrogen dioxide.United States Clean Air Act, {{USC|42|7602}}

{{Citation

|last = Seinfeld

|first = John H.

|author-link = John H. Seinfeld

|last2 = Pandis

|first2 = Spyros N.

|title = Atmospheric Chemistry and Physics: From Air Pollution to Climate Change

|publisher = Wiley-Interscience

|year = 1997

|isbn = 0-471-17816-0

|url-access = registration

|url = https://archive.org/details/atmosphericchemi0000sein

}}

NOy (or NOy) refers to the sum of {{chem2|NO_{x}|}} and all oxidized atmospheric odd-nitrogen species (e.g. the sum of {{chem2|NO_{x}|}}, Nitric acid, Nitrous acid, etc.)
{{chem2|NO_{z}|}} (or NOz) = {{chem2|NO_{y}|}} − {{chem2|NO_{x}|}}

Mixed Oxides of Nitrogen ("MON"): solutions of nitric oxide in dinitrogen tetroxide/nitrogen dioxide.

Image:Nitric-oxide-3D-vdW.png|{{center|Nitric oxide, NO}}

Image:Nitrogen-dioxide-3D-vdW.png|{{center|Nitrogen dioxide, {{chem2|NO2}}}}

Image:Nitrous-oxide-3D-vdW.png|{{center|Nitrous oxide, {{chem2|N2O}}}}

Image:Dinitrogen-trioxide-3D-vdW.png|{{center|Dinitrogen trioxide, {{chem2|N2O3}}}}

Image:Dinitrogen-tetroxide-3D-vdW.png|{{center|Dinitrogen tetroxide, {{chem2|N2O4}}}}

Image:Dinitrogen-pentoxide-3D-vdW.png|{{center|Dinitrogen pentoxide, {{chem2|N2O5}}}}

Image:Trinitramide-3D-spacefill.png|{{center|Trinitramide, {{chem2|N4O6}}}}

Stability

Due to relatively weak N–O bonding, all nitrogen oxides are unstable with respect to {{chem2|N2}} and {{chem2|O2}}, which is the principle behind the catalytic converter, and prevents the oxygen and nitrogen in the atmosphere from combusting.

References

Category:Industrial gases