Dinitrogen dioxide

Dinitrogen dioxide
Identifiers
CAS Number	linear: 16824-89-8 ; cyclic: 13354-65-9; bicyclic: 158362-70-0;
3D model (JSmol)	linear: Interactive image; cyclic: Interactive image; bicyclic: Interactive image;
ChEBI	linear: CHEBI:29797;
ChemSpider	linear: 5256996; cyclic: 29334740; bicyclic: 57448491;
Gmelin Reference	1035
PubChem CID	linear: 6857661;
UNII	P6TX5AE4Q8 ;
	InChI InChI=1S/N2O2/c3-1-2-4 Key: AZLYZRGJCVQKKK-UHFFFAOYSA-N;
	SMILES linear: N(=O)N=O; cyclic: O1N=NO1; bicyclic: O1N2N1O2;
Properties
Chemical formula	N2O2
Molar mass	60.012 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Dinitrogen dioxide is an inorganic compound having molecular formula N
₂O
₂. Many structural isomers are possible. The covalent bonding pattern O=N–N=O (a non-cyclic dimer of nitric oxide (NO)) is predicted to be the most stable isomer based on ab initio calculations and is the only one that has been experimentally produced. In the solid form, the molecules have C_2v symmetry: the entire structure is planar, with the two oxygen atoms cis across the N–N bond. The O–N distance is 1.15 Å, the N–N distance is 2.33 Å, and the O=N–N angle is 95°.

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