Carbonyl fluoride
| Carbonyl fluoride | |
|---|---|
 |
 |
| IUPAC name Carbonyl difluoride | |
| Other names Fluorophosgene | |
| Identifiers | |
| CAS number | 353-50-4  |
| ChemSpider | 9246 |
| UN number | 2417 |
| RTECS number | FG6125000 |
| Jmol-3D images | Image 1 |
| |
| |
| Properties | |
| Molecular formula | COF2 |
| Molar mass | 66.01 g mol−1 |
| Appearance | Colorless gas |
| Density | 2.698 g dm−3 (gas), 1.139 g dm−3 (liquid at melting point) |
| Melting point | −111.26 °C; −168.27 °F; 161.89 K |
| Boiling point | −84.57 °C; −120.23 °F; 188.58 K |
| Structure | |
| Molecular shape | C2v |
| Dipole moment | 0.95 D |
| Hazards | |
| Main hazards | Highly toxic (Often fatal), Water reactive |
| NFPA 704 |
 0
4
2
|
| Flash point | Non-flammable |
| Related compounds | |
| Related compounds | Phosgene Carbonyl bromide Formyl fluoride |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| Infobox references | |
Carbonyl fluoride is the inorganic compound with the formula COF2. This gas, like its analog phosgene, is colourless and highly toxic. The molecule is planar with C2v symmetry.
Preparation and properties
Carbonyl fluoride can be prepared by reaction of phosgene with hydrogen fluoride and the oxidation of carbon monoxide, although the latter tends to result in over-oxidation to carbon tetrafluoride. The oxidation of carbon monoxide with silver difluoride is convenient:
- CO + 2 AgF2 → COF2 + 2 AgF
Carbonyl fluoride is unstable in the presence of water, hydrolyzing to carbon dioxide and hydrogen fluoride.[1]
Safety
Carbonyl fluoride is extremely poisonous with a threshold limit value of 2 ppm for short-term exposure.[2]
References
- ↑ M. W. Farlow, E. H. Man, C. W. Tullock "Carbonyl Fluoride" Inorganic Syntheses, 1960, Volume 6, pp, 155–158. doi:10.1002/9780470132371.ch48
- ↑ CDC - NIOSH Pocket Guide to Chemical Hazards - Carbonyl Fluoride, accessed 2013-09-10