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Names | |||
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Preferred IUPAC name
Carbonyl difluoride | |||
Other names
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Identifiers | |||
3D model (JSmol)
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ChemSpider | |||
ECHA InfoCard | 100.005.941 | ||
EC Number |
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PubChem CID
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RTECS number |
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UNII | |||
UN number | 2417 | ||
CompTox Dashboard (EPA)
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Properties | |||
COF2 | |||
Molar mass | 66.007 g·mol−1 | ||
Appearance | Colorless gas | ||
Odor | Pungent and very irritating[1] | ||
Density | 2.698 g/L (gas), 1.139 g/cm3 (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) | ||
Reacts[2] | |||
Vapor pressure | 55.4 atm (20°C)[2] | ||
Structure | |||
C2v | |||
0.95 D | |||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards
|
Very toxic, reacts with water to release HF | ||
GHS labelling: | |||
Danger | |||
H280, H290, H314, H330, H331, H370 | |||
P234, P260, P261, P264, P270, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P307+P311, P310, P311, P320, P321, P363, P390, P403+P233, P404, P405, P410+P403, P501 | |||
NFPA 704 (fire diamond) | |||
Flash point | Non-flammable | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
|
none[2] | ||
REL (Recommended)
|
TWA 2 ppm (5 mg/m3) ST 5 ppm (15 mg/m3)[2] | ||
IDLH (Immediate danger)
|
N.D.[2] | ||
Related compounds | |||
Related compounds
|
|||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
|
Carbonyl fluoride is a chemical compound with the formula COF2. It is a carbon oxohalide. This gas, like its analog phosgene, is colourless and highly toxic. The molecule is planar with C2v symmetry, bond lengths of 1.174 Å (C=O) and 1.312 Å (C–F), and an F–C–F bond angle of 108.0°.[3]
Preparation and properties
Carbonyl fluoride is usually produced as a decomposition product of fluorinated hydrocarbons in the thermal decomposition thereof, for example from trifluoromethanol or tetrafluoromethane in the presence of water:
- CF4 + H2O → COF2 + 2 HF
Carbonyl fluoride can also be prepared by reaction of phosgene with hydrogen fluoride and the fluorination of carbon monoxide, although the latter tends to result in over-fluorination to carbon tetrafluoride. The fluorination 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:[4]
- COF2 + H2O → CO2 + 2 HF
Safety
Carbonyl fluoride is very toxic with a recommended exposure limit of 2 ppm as an 8-hour time weighted average and a 5 ppm as a short-term (15-minute average) exposure, where 1 ppm = 2.70 mg of carbonyl fluoride per 1 m3 of air.[1]
References
- ^ a b "Carbonyl Fluoride". NIOSH Pocket Guide to Chemical Hazards. CDC Centers for Disease Control and Prevention. Retrieved 2013-09-10.
- ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0108". National Institute for Occupational Safety and Health (NIOSH).
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 304–305. ISBN 978-0-08-037941-8.
- ^ M. W. Farlow; E. H. Man; C. W. Tullock (1960). "Carbonyl Fluoride". Inorganic Syntheses. Inorganic Syntheses. Vol. 6. pp. 155–158. doi:10.1002/9780470132371.ch48. ISBN 9780470132371.
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File:Carbonyl-fluoride-3D-vdW.png
Preferred IUPAC name
CAS Registry Number
JSmol
ChemSpider
ECHA InfoCard
Q251793#P2566
European Community number
PubChem
RTECS
Unique Ingredient Identifier
UN number
CompTox Chemicals Dashboard
Q251793#P3117
International Chemical Identifier
Simplified molecular-input line-entry system
Chemical formula
Molar mass
Odor
Density
Melting point
Boiling point
Aqueous solution
Vapor pressure
Molecular geometry
Dipole#Molecular dipoles
Debye
Occupational safety and health
Hydrofluoric acid
Globally Harmonized System of Classification and Labelling of Chemicals
GHS hazard pictograms
File:GHS-pictogram-bottle.svg
File:GHS-pictogram-acid.svg
File:GHS-pictogram-skull.svg
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Globally Harmonized System of Classification and Labelling of Chemicals#Signal word
GHS hazard statements
GHS precautionary statements
NFPA 704
NFPA 704#Blue
NFPA 704#Red
NFPA 704#Yellow
NFPA 704#White
NFPA 704#Blue
NFPA 704#Red
NFPA 704#Yellow
NFPA 704#White
Flash point
National Institute for Occupational Safety and Health
Permissible exposure limit
Recommended exposure limit
IDLH
Phosgene
Carbonyl bromide
Formyl fluoride
Thiocarbonyl chloride
Acetone
Urea
Carbonic acid
Standard state
Wikipedia:WikiProject Chemicals/Chembox validation
Wikipedia:Chemical infobox#References
Chemical compound
Chemical formula
Carbon
Oxygen
Fluorine
Carbon oxohalide
Phosgene
Trigonal planar molecular geometry
Symmetry group
Bond length
Bond angle
Trifluoromethanol
Tetrafluoromethane
Hydrogen fluoride
Carbon monoxide
Carbon tetrafluoride
Silver difluoride
Hydrogen fluoride
Recommended exposure limit
Parts-per notation
National Institute for Occupational Safety and Health
Norman Greenwood
Butterworth-Heinemann
ISBN (identifier)
Special:BookSources/978-0-08-037941-8
Doi (identifier)
ISBN (identifier)
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فلوريد الكربونيل
کربونیل فلورید
Karbonylfluorid
Carbonylfluorid
Karbonila fluorido
کربنیل فلورید
Fluorure de carbonyle
플루오린화 카르보닐
कार्बोनिल फ्लोराइड
Fluorofosgene
Karbonil-fluorid
Carbonylfluoride
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Карбонилфторид
Karbonil fluorid
Karbonil fluorid
Karbonyylifluoridi
Karbonylfluorid
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కార్బొనైల్ ఫ్లోరైడ్
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فلوريد الكربونيل
کربونیل فلورید
Karbonylfluorid
Carbonylfluorid
Karbonila fluorido
کربنیل فلورید
Fluorure de carbonyle
플루오린화 카르보닐
कार्बोनिल फ्लोराइड
Fluorofosgene
Karbonil-fluorid
Carbonylfluoride
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Karbonil fluorid
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Karbonyylifluoridi
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فلوريد الكربونيل
کربونیل فلورید
Karbonylfluorid
Carbonylfluorid
Karbonila fluorido
کربنیل فلورید
Fluorure de carbonyle
플루오린화 카르보닐
कार्बोनिल फ्लोराइड
Fluorofosgene
Karbonil-fluorid
Carbonylfluoride
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Karbonil fluorid
Karbonil fluorid
Karbonyylifluoridi
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