Dinitrogen difluoride

Dinitrogen difluoride^[1]
cis-dinitrogen difluoride	trans-dinitrogen difluoride
Names
	IUPAC name cis- or trans-dinitrogen difluoride
	Other names cis- or trans-difluorodiazene
Identifiers
CAS Number	13812-43-6 (cis) ; 13776-62-0 (trans);
3D model (JSmol)	(cis): Interactive image; (trans): Interactive image;
ChemSpider	10326121 (cis) ; 4516471 (trans) ;
PubChem CID	5364290 (cis); 5462838 (trans);
	InChI (cis): InChI=1S/F2N2/c1-3-4-2/b4-3- Key: DUQAODNTUBJRGF-ONEGZZNKBY; (trans): InChI=1/F2N2/c1-3-4-2/b4-3+ Key: DUQAODNTUBJRGF-ONEGZZNKBY; InChI=1S/F2N2/c1-3-4-2/b4-3+ Key: DUQAODNTUBJRGF-ARJAWSKDSA-N ;
	SMILES (cis): F\N=N\F; (trans): F\N=N/F;
Properties
Chemical formula	FN=NF
Molar mass	66.011 g·mol−1
Appearance	Colorless gas
Density	2.698 g/L
Melting point	cis: less than −195 °C (−319.0 °F; 78.1 K) ; trans: −172 °C (−278 °F)
Boiling point	cis: −105.75 °C (−158.35 °F; 167.40 K) ; trans: −111.45 °C (−168.61 °F)
Dipole moment	cis: 0.16 D; trans: 0 D
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	cis: 69.5 kJ/mol; trans: 82.0 kJ/mol
Related compounds
Other anions	Azide
Other cations	Ammonium; Diazonium compounds; Pentazenium; Tetrafluoroammonium;
Related compounds	Azo compounds; Diazene; Triazene; Tetrazene; Nitrogen trifluoride; Tetrafluorohydrazine;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Dinitrogen difluoride is a chemical compound with the formula N₂F₂. It is a gas at room temperature, and was first identified in 1952 as the thermal decomposition product of the fluorine azide (FN₃). It has the structure F−N=N−F and exists in both cis and trans isomers, as typical for diimides.

^ Lide, David R. (1998). Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. pp. 4–73, 5–15, 9–46. ISBN 0-8493-0594-2.