Dioxygen difluoride

Dioxygen difluoride is a compound of fluorine and oxygen with the molecular formula O2F2. It can exist as an orange-colored solid which melts into a red liquid at −163 °C (110 K). It is an extremely strong oxidant and decomposes into oxygen and fluorine even at −160 °C (113 K) at a rate of 4% per day — its lifetime at room temperature is thus extremely short. Dioxygen difluoride reacts vigorously with nearly every chemical it encounters (including ordinary ice) leading to its onomatopoeic nickname FOOF (a play on its chemical structure and its explosive tendencies).

Dioxygen difluoride
Names
Preferred IUPAC name
Dioxygen difluoride
Systematic IUPAC name
Fluorooxygen hypofluorite
Other names
  • Monofluorooxygenyl hypofluorite
  • Peroxydifluoride
  • Oxygen perfluoride
  • Oxyfluoryl hypofluorite
  • Fluorine peroxide
  • FOOF
Identifiers
3D model (JSmol)
Abbreviations FOOF
ChEBI
ChemSpider
1570
PubChem CID
UNII
  • InChI=1S/F2O2/c1-3-4-2 Y
    Key: REAOZOPEJGPVCB-UHFFFAOYSA-N Y
  • InChI=1/F2O2/c1-3-4-2
    Key: REAOZOPEJGPVCB-UHFFFAOYAK
SMILES
  • FOOF
Properties
O
2F
2
Molar mass 69.996 g·mol−1
Appearance orange as a solid
red as a liquid
Density 1.45 g/cm3 (at b.p.)
Melting point −154 °C (−245 °F; 119 K)
Boiling point −57 °C (−71 °F; 216 K) extrapolated
Solubility in other solvents decomposes
Thermochemistry
62.1 J/(mol·K)
Std molar
entropy (S⦵298)
 277.2 J/(mol·K)
Std enthalpy of
formation (ΔfH⦵298)
 19.2 kJ/mol
58.2 kJ/mol
Related compounds
Related compounds
Hazards
GHS labelling:
Danger
NFPA 704 (fire diamond)
4
0
4
OX
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.