Bromine trifluoride

Bromine trifluoride
Bromine trifluoride
General
Molecular formula	BrF3
Molar mass	136.90 g/mol
Appearance	straw-coloured liquid
CAS number	[7787-71-5]
Properties
Density and phase	2.8 g/ml, liquid
Solubility in water	decomposes
Melting point	8.8 °C
Boiling point	125.8 °C
Viscosity	? cP at ? °C
Structure
Molecular shape	T-shaped
Dipole moment	? D
Hazards
MSDS	External MSDS
EU classification	not listed
NFPA 704	Nfpa_h3.png Nfpa_f0_ox.png Nfpa_r3.png
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other s	Bromine monochloride
Other s	Chlorine trifluoride Iodine trifluoride
Related compounds	Bromine monofluoride Bromine pentafluoride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Bromine trifluoride is a highly toxic and corrosive fluoride of bromine with chemical formula BrF₃. It was discovered by P Lebau in 1906. It occurs as a colorless, yellow, or gray fuming liquid with an irritating odor. It is soluble in sulfuric acid but may explode on contact with water.

Synthesis

Bromine trifluoride can be obtained by the reaction of bromine with fluorine at 20 °C.

Br₂ + 3F₂ â†' 2BrF₃

The disproportionation of bromine monofluoride is also a source for bromine trifluoride.

3BrF â†' BrF₃ + Br₂

Structure

Bromine-trifluoride-chemical-structure

Like ClF₃ and IF₃ the BrF₃ molecule is T-shaped. With the two electron pairs the coordination sphere is 5. The distance from the bromine each axial fluorine is 1.81 Ã… and to the equatorial fluorine is 1.72 Ã…. The angle between an axial fluorine and the equatorial fluorine is slightly smaller than 90° â€" the 86.2° angle observed is due to the replusion generated by the electron pairs being greater than that of the Br-F bonds.

References

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External links

*National Pollutant Inventory - Flouride and compounds fact sheet