Bromine pentafluoride

Bromine pentafluoride

Chembox new
Name = Bromine pentafluoride
ImageFile = Bromine-pentafluoride-gas-2D-dimensions.png ImageName = Structure and dimensions of the bromine pentafluoride molecule in the gas phase
ImageFile1 = Bromine-pentafluoride-3D-balls.png ImageName1 = Ball-and-stick model of bromine pentafluoride
ImageFile2 = Bromine-pentafluoride-3D-vdW.png ImageName2 = Space-filling model of bromine pentafluoride
IUPACName = Bromine pentafloride
Section1 = Chembox Identifiers
CASNo = 7789-30-2
Section2 = Chembox Properties
Formula = BrF5
MolarMass = 174.894 g.mol−1
Appearance = Pale yellow solid
MeltingPt = −61.30 °C
BoilingPt = 40.25 °C
Section7 = Chembox Hazards
ExternalMSDS = [http://physchem.ox.ac.uk/MSDS/BR/bromine_pentafluoride.html External MSDS]
NFPA-H = 4
NFPA-F =
NFPA-R = 3 | Other=OX
FlashPt = Non-flammable
RSPhrases = R2 R23 R24 R25
Section8 = Chembox Related
OtherAnions = Bromine monochloride
OtherCations = Chlorine pentafluoride
Iodine pentafluoride
Function = compounds
OtherFunctn = Bromine monofluoride
Bromine trifluoride

Bromine pentafluoride, BrF5, is an interhalogen compound and a fluoride of bromine. It is a strong fluorination reagent.

It melts at −61.30 °C and boils at 40.25 °C. BrF5 finds use in oxygen isotope analysis. Laser ablation of solid silicates in the presence of bromine pentafluoride releases O2 for subsequent analysis.


=PreparationN. N. Greenwood, A. Earnshaw. "Chemie prvku" ("Chemistry of the Elements"). Informatorium, Prague, 1993.] =

It was the first time prepared in 1930.

It can be prepared by disproportionation of BrF:: 3 BrF → BrF3 + Br2Preparation of larger quantities can be accomplished by reaction with temperature over 150 °C and an excess of fluorine:: Br2 + 5 F2 → 2 BrF5For preparation of smaller amounts can be used reaction:: KBr + 3 F2 → KF + BrF5

Reactions

Bromine pentafluoride reacts explosively with water by reaction:: BrF5 + 3 H2O → HBrO3 + 5 HF

It is an extremely effective fluorinating agent, converting most uranium compounds to the hexafluoride at room temperature.

References

External links

* [http://webbook.nist.gov/cgi/cbook.cgi?ID=C7789302 WebBook page for BrF5]
*ICSC|0974|09
*PGCH|0065
* [http://www.npi.gov.au/database/substance-info/profiles/44.html National Pollutant Inventory - Flouride and compounds fact sheet]


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