Bromine pentafluoride
From Wikipedia, the free encyclopedia
| Bromine pentafluoride | |
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| IUPAC name | Bromine pentafloride |
| Identifiers | |
| CAS number | [7789-30-2] |
| Properties | |
| Molecular formula | BrF5 |
| Molar mass | 174.894 g.mol−1 |
| Appearance | Pale yellow solid |
| Melting point |
−61.30 °C |
| Boiling point |
40.25 °C |
| Hazards | |
| MSDS | External MSDS |
| MSDS | External MSDS |
| NFPA 704 |
 0
4
3
|
| R/S statement | R2 R23 R24 R25 |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Bromine monochloride |
| Other cations | Chlorine pentafluoride Iodine pentafluoride |
| Related compounds | Bromine monofluoride Bromine trifluoride |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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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.
Contents |
[edit] Preparation[1]
It was the first time prepared in 1930.
It can be prepared by disproportiation of BrF:
- 3 BrF → BrF3 + Br2
Preparation of larger quantities can be accomplished by reaction with temperature over 150 °C and an excess of fluorine:
- Br2 + 5 F2 → 2 BrF5
For preparation of smaller amounts can be used reaction:
- KBr + 3 F2 → KF + BrF5
[edit] 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.
[edit] References
- ^ N. N. Greenwood, A. Earnshaw. Chemie prvku (Chemistry of the Elements). Informatorium, Prague, 1993.
