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Bromofluoromethane
Bromofluoromethylene CFC 31B1 R 31B1
Bromofluoromethane is a mixed gaseous halomethane soluble in alcohol and very soluble in chloroform.
Its standard molar entropy, Sogas is 276.3 J/(mol K) and heat capacity, cp is 49.2 J/(mol K).
Preparation
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.
Uses
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
External sources
- Determination of the molecular dipole moment of bromofluoromethane
- http://www.valliscor.com/bromofluoromethane
References
- [http://www.freepatentsonline.com/5189229.html Debrominating dibromofluoromethane with tributyltin hydride]
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
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