Back ثنائي فلوريد الأكسجين Arabic اوکسیژن دی‌فلوئورید AZB Кислороден дифлуорид Bulgarian Difluorid kyslíku Czech Sauerstoffdifluorid German Διφθοριούχο οξυγόνο Greek Difluoruro de oxígeno Spanish اکسیژن دی‌فلوئورید Persian Happidifluoridi Finnish Difluorure d'oxygène French

Oxygen difluoride

Oxygen difluoride
Structure and dimensions of the oxygen difluoride molecule
Space-filling model of the oxygen difluoride molecule
Names
IUPAC name
Oxygen difluoride
Other names
  • Oxygen fluoride
  • Hypofluorous anhydride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.087 Edit this at Wikidata
EC Number
  • 231-996-7
RTECS number
  • RS2100000
UNII
  • InChI=1S/F2O/c1-3-2 checkY
    Key: UJMWVICAENGCRF-UHFFFAOYSA-N checkY
  • InChI=1/F2O/c1-3-2
    Key: UJMWVICAENGCRF-UHFFFAOYAI
  • FOF
Properties
OF2
Molar mass 53.9962 g/mol
Appearance colorless gas, pale yellow liquid when condensed
Odor peculiar, foul
Density
  • 1.90 g/cm3 (−224 °C, liquid)
  • 1.719 g/cm3 (−183 °C, liquid)
  • 1.521 g/cm3 (liquid at −145 °C)
  • 1.88 g/L (gas at room temperature)
Melting point −223.8 °C (−370.8 °F; 49.3 K)
Boiling point −144.75 °C (−228.55 °F; 128.40 K)
hydrolyzes[1] slowly
Vapor pressure 48.9 atm (at −58.0 °C or −72.4 °F or 215.2 K[a])
Thermochemistry
43.3 J/mol K
246.98 J/mol K
−24.5 kJ mol−1
42.5 kJ/mol
Hazards
GHS labelling:[4]
GHS03: OxidizingGHS04: Compressed GasGHS05: CorrosiveGHS06: Toxic
Danger
H270, H280, H314, H330
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
4
0
3
OX
Lethal dose or concentration (LD, LC):
  • 2.6 ppm (rat, 1 hour)
  • 1.5 ppm (mouse, 1 hour)
  • 26 ppm (dog, 1 hour)
  • 16 ppm (monkey, 1 hour)
[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.05 ppm (0.1 mg/m3)[2]
REL (Recommended)
 C 0.05 ppm (0.1 mg/m3)[2]
IDLH (Immediate danger)
 0.5 ppm[2]
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Oxygen difluoride is a chemical compound with the formula OF2. As predicted by VSEPR theory, the molecule adopts a bent molecular geometry. It is a strong oxidizer and has attracted attention in rocketry for this reason.[5] With a boiling point of −144.75 °C, OF2 is the most volatile (isolable) triatomic compound.[6] The compound is one of many known oxygen fluorides.

  1. ^ "difluorine monoxide; oxygen difluoride, physical properties, suppliers, CAS, MSDS, structure, Molecular Formula, Molecular Weight, Solubility, boiling point, melting point". www.chemyq.com.
  2. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0475". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ "Oxygen difluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ GHS: GESTIS 570242
  5. ^ "Oxygen Difluoride - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2023-11-03.
  6. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 819. ISBN 978-0-08-037941-8.


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