Bromodifluoromethane

Bromodifluoromethane
Names
Preferred IUPAC name
Bromo(difluoro)methane
Other names
Bromodifluoromethane
Difluorobromomethane
Halon 1201
HBFC-22B1
FC-22B1
R-22B1
FM-100
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.014.681
EC Number 216-149-1
Properties
CHBrF2
Molar mass 130.92 g/mol
Appearance Gas
Density 1.55 g/cm3 at 16 °C
Melting point −145 °C (−229 °F; 128 K)
Boiling point −14.6 °C (5.7 °F; 258.5 K)
Insoluble
Solubility Alcohol, diethyl ether
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

Bromodifluoromethane or Halon 1201 or FC-22B1 is a gaseous trihalomethane or a hydrobromofluorocarbon.

Synthesis

It can be prepared be reaction of hydrogen and dibromodifluoromethane at temperature in range 400–600 °C.[1]

Critical point data: Tc = 138.83 °C (411.98 K); pc = 5.2 MPa (51.32 bar); Vc = 0.275 dm3.mol−1.

Applications

Bromodifluoromethane was used as a refrigerant and in fire extinguishers. It is a class I ozone depleting substance with ozone depletion potential ODP = 0.74. It was banned by Montreal Protocol in 1996.

References

  • Ogata T, Kuwano S, Oe S (September 1997). "Microwave Spectrum, Nuclear Quadrupole Coupling Constants, and Structure of Bromodifluoromethane". J Mol Spectrosc. 185 (1): 147–52. doi:10.1006/jmsp.1997.7381. PMID 9344805.
  • Cox R.A.; Simmons R.F. (1971). "The kinetics of the gas-phase thermal decomposition of bromodifluoromethane". J. Chem. Soc. B: 1625–31. doi:10.1039/J29710001625.
  • Plyler E.K.; Acquista N. (January 1952). "Infrared Absorption Spectra of Five Halomethanes" (PDF). Journal of Research of the National Bureau of Standards. 48 (1): 92–7. doi:10.6028/jres.048.012. Research Paper 2290.


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