“Bromodifluoromethane”的意思、由来-开放百科全书

词条

Bromodifluoromethane

释义

Synthesis
Applications
References
External links

{{chembox
| Watchedfields = changed
| verifiedrevid = 429862040
| ImageFile = Bromodifluoromethane.png
| ImageSize = 120px
| PIN = Bromo(difluoro)methane
| OtherNames = Bromodifluoromethane
Difluorobromomethane
Halon 1201
HBFC-22B1
FC-22B1
R-22B1
FM-100
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 56193
| SMILES1 = BrC(F)F
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/CHBrF2/c2-1(3)4/h1H
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = GRCDJFHYVYUNHM-UHFFFAOYSA-N
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 1511-62-2
| EINECS = 216-149-1
| PubChem = 62407
| SMILES = C(F)(F)Br
| InChI = 1/CHBrF2/c2-1(3)4/h1H
|Section2={{Chembox Properties
| Formula = CHBrF₂
| MolarMass = 130.92 g/mol
| Appearance = Gas
| Density = 1.55 g/cm³ at 16 °C
| MeltingPtC = -145
| MeltingPt_notes =
| BoilingPtC = -14.6
| BoilingPt_notes =
| Solubility = Insoluble
| SolubleOther = Alcohol, diethyl ether
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt =
}}

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: 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. It was banned by Montreal Protocol in 1996.

References

1. ^Method for the production of bromodifluoromethane

External links

{{cite journal |vauthors=Ogata T, Kuwano S, Oe S |title=Microwave Spectrum, Nuclear Quadrupole Coupling Constants, and Structure of Bromodifluoromethane |journal=J Mol Spectrosc |volume=185 |issue=1 |pages=147–52 |date=September 1997 |pmid=9344805 |doi=10.1006/jmsp.1997.7381 }}
{{cite journal |author=Cox R.A. |author2=Simmons R.F. |title=The kinetics of the gas-phase thermal decomposition of bromodifluoromethane |journal=J. Chem. Soc. B |volume= |issue= |pages=1625–31 |year=1971 |doi=10.1039/J29710001625 |url=http://www.rsc.org/publishing/journals/article.asp?doi=j29710001625}}
{{cite journal |author=Plyler E.K. |author2=Acquista N. |title=Infrared Absorption Spectra of Five Halomethanes |journal=Journal of Research of the National Bureau of Standards |volume=48 |issue=1 |pages=92–7 |date=January 1952 |url=http://nvl.nist.gov/pub/nistpubs/jres/048/1/V48.N01.A12.pdf |format=PDF |id=Research Paper 2290 |doi=10.6028/jres.048.012}}

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