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Bromofluoromethane 
Summary
Bromofluoromethane is a mixed gaseous halomethane soluble in alcohol and very soluble in chloroform.
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| Preferred IUPAC name
Bromo(fluoro)methane | |
| Other names
Bromofluoromethane
Bromofluoromethylene CFC 31B1 R 31B1 | |
| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.117.922 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| CH2BrF | |
| Molar mass | 112.93 g/mol |
| Appearance | Gas |
| Boiling point | 19 °C (66 °F; 292 K) |
| Structure | |
| Tetrahedral | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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Its standard molar entropy, Sogas is 276.3 J/(mol K) and heat capacity, cp is 49.2 J/(mol K).
Preparation edit
Up to date, it has been prepared by three prevailingly ineffective methods:
- From salts of fluoroacetic acid using a Hunsdiecker type of reaction.
- From dibromofluoromethane by reductive debromination with a Swarts reagent.
- From a dihalomethane by an halogen exchange reaction or from a halomethane by catalyzed bromination or fluorination.
The method with the highest yield is reductive debromination of dibromofluoromethane using an organotin hydride.[1]
Uses edit
Bromofluoromethane is an important reagent in the manufacture of intermediates, pharmaceuticals and other chemicals. Usage of bromofluoromethane is regulated due to its ozone depletion potential (0.73). Its isotopomer CH2Br18F contains fluorine-18 (18F) and is used in radiochemistry.
References edit
- ^ Debrominating dibromofluoromethane with tributyltin hydride
External sources edit
- Determination of the molecular dipole moment of bromofluoromethane[permanent dead link]
- http://www.valliscor.com/bromofluoromethane