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 (NO2), nitrogen(IV) oxide Nitrogen trioxide (NO3), or nitrate radical Nitrous oxide (N2O), nitrogen(0,II) oxide Dinitrogen dioxide (N2O2), nitrogen(II) oxide dimer Dinitrogen trioxide (N2O3), nitrogen(II,IV) oxide Dinitrogen tetroxide (N2O4), nitrogen(IV) oxide dimer Dinitrogen pentoxide (N2O5), nitrogen(V) oxide, or nitronium nitrate [NO2]+[NO3]− Nitrosyl azide (N4O), nitrogen(−I,0,I,II) oxide Nitryl azide (N4O2) Oxatetrazole (N4O) Trinitramide (N(NO2)3 or N4O6), nitrogen(0,IV) oxide
Anions
Cations Nitrosonium (N≡O+ or [NO]+) Nitronium (O=N+=O or [NO2]+)
Atmospheric sciences In atmospheric chemistry:
NOx (or NOx) refers to the sum of NO and NO2. 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) = NOy − NOx Mixed Oxides of Nitrogen ("MON"): solutions of nitric oxide in dinitrogen tetroxide/nitrogen dioxide.
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 Nitrate Nitrogen oxide sensor Sulfur nitrides, which are valence isoelectronic with nitrogen oxides
References