Bromodifluoromethane

Bromodifluoromethane

Names
Preferred IUPAC name Bromo(difluoro)methane
Other names Bromodifluoromethane Difluorobromomethane Halon 1201 HBFC-22B1 FC-22B1 R-22B1 FM-100
Identifiers
CAS Number	1511-62-2  Y
3D model (JSmol)	Interactive image Interactive image
ChemSpider	56193  Y
ECHA InfoCard	100.014.681
EC Number	216-149-1
PubChem CID	62407
UNII	L1F4C2FIBR  Y
CompTox Dashboard (EPA)	DTXSID5061740
InChI InChI=1S/CHBrF2/c2-1(3)4/h1H Y Key: GRCDJFHYVYUNHM-UHFFFAOYSA-N Y InChI=1/CHBrF2/c2-1(3)4/h1H
SMILES C(F)(F)Br BrC(F)F
Properties
Chemical formula	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)
Solubility in water	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). Y  verify  (what is  YN ?) Infobox references

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

Synthesis

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

Critical point data: T_c = 138.83 °C (411.98 K); p_c = 5.2 MPa (51.32 bar); V_c = 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, and a greenhouse gas with global warming potential over 100 years of 398, which is nonetheless much smaller than other fluorinated gases due to its relatively short atmospheric lifetime of 5.2 years. ^[2] It was banned by the Montreal Protocol in 1996.

References

1. "Method for the production of bromodifluoromethane". Archived from the original on 2007-10-14. Retrieved 2007-05-24.
2. Hodnebrog Ø, Aamaas B, Fuglestvedt JS, Marston G, Myhre G, Nielsen CJ, Sandstad M, Shine KP, Wallington TJ (September 2020). "Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers". Reviews of Geophysics. 58 (3): e2019RG000691. Bibcode:2020RvGeo..5800691H. doi:10.1029/2019RG000691. PMC   7518032 . PMID   33015672.

External links

• 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. Bibcode:1997JMoSp.185..147O. 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". Journal of Research of the National Bureau of Standards. 48 (1): 92–7. doi: 10.6028/jres.048.012 . Research Paper 2290.