Bromine pentafluoride
2317016
220893909
2008-06-22T02:59:35Z
71.179.229.162
/* PreparationN. N. Greenwood, A. Earnshaw. Chemie prvku (Chemistry of the Elements). Informatorium, Prague, 1993. */
{{Chembox new
| Name = Bromine pentafluoride
| ImageFile = Bromine-pentafluoride-gas-2D-dimensions.png
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| ImageName = Structure and dimensions of the bromine pentafluoride molecule in the gas phase
| ImageFile1 = Bromine-pentafluoride-3D-balls.png
<!-- | ImageSize1 = 100px -->
| ImageName1 = Ball-and-stick model of bromine pentafluoride
| ImageFile2 = Bromine-pentafluoride-3D-vdW.png
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| ImageName2 = Space-filling model of bromine pentafluoride
| IUPACName = Bromine pentafloride
| Section1 = {{Chembox Identifiers
| CASNo = 7789-30-2
}}
| Section2 = {{Chembox Properties
| Formula = BrF<sub>5</sub>
| MolarMass = 174.894 g.mol<sup>−1</sup>
| 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]]<br />[[Iodine pentafluoride]]
| Function = [[compound]]s
| OtherFunctn = [[Bromine monofluoride]]<br />[[Bromine trifluoride]]
}}
}}
'''Bromine pentafluoride''', [[bromine|Br]][[fluorine|F<sub>5</sub>]], is an [[interhalogen]] [[chemical compound|compound]] and a [[fluoride]] of [[bromine]]. It is a strong [[fluorination]] reagent.
It melts at −61.30 °C and boils at 40.25 °C. BrF<sub>5</sub> finds use in [[isotopes of oxygen|oxygen]] [[isotope analysis]]. [[Laser ablation]] of solid [[silicate]]s in the presence of bromine pentafluoride releases [[Oxygen#Allotropes|O<sub>2</sub>]] for subsequent analysis.
==Preparation<ref name="chemelem">N. N. Greenwood, A. Earnshaw. ''Chemie prvku'' (''Chemistry of the Elements''). Informatorium, Prague, 1993.</ref>==
It was the first time prepared in 1930.
It can be prepared by disproportionation of [[Bromine monofluoride|BrF]]:
: 3 BrF → BrF<sub>3</sub> + Br<sub>2</sub>
Preparation of larger quantities can be accomplished by reaction with temperature over 150 °C and an excess of fluorine:
: Br<sub>2</sub> + 5 F<sub>2</sub> → 2 BrF<sub>5</sub>
For preparation of smaller amounts can be used reaction:
: KBr + 3 F<sub>2</sub> → KF + BrF<sub>5</sub>
==Reactions==
Bromine pentafluoride reacts explosively with water by reaction:
: BrF<sub>5</sub> + 3 H<sub>2</sub>O → HBrO<sub>3</sub> + 5 HF
It is an extremely effective fluorinating agent, converting most uranium compounds to the hexafluoride at room temperature.
==References==
<references/>
==External links==
*{{ICSC|0974|09}}
*{{PGCH|0065}}
*[http://www.npi.gov.au/database/substance-info/profiles/44.html National Pollutant Inventory - Flouride and compounds fact sheet]
[[Category:Fluorides]]
[[Category:Bromine compounds]]
[[Category:Interhalogen compounds]]
[[pt:Pentafluoreto de bromo]]