Bromine dioxide
Chemical compound
From Wikipedia, the free encyclopedia
Bromine dioxide is the chemical compound composed of bromine and oxygen with the formula BrO2. It forms unstable yellow[2] to yellow-orange[1] crystals. It was first isolated by R. Schwarz and M. Schmeißer in 1937 and is hypothesized to be important in the atmospheric reaction of bromine with ozone.[3] It is similar to chlorine dioxide, the dioxide of its halogen neighbor one period higher on the periodic table.[citation needed]
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| Names | |
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| IUPAC name
Bromine dioxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| Properties | |
| BrO2 | |
| Molar mass | 111.903 g/mol[1] |
| Appearance | unstable yellow crystals |
| Melting point | decomposes around 0°C |
| Related compounds | |
Other anions |
Bromine monoxide Bromine trifluoride Bromine pentafluoride |
Other cations |
Oxygen difluoride Dichlorine monoxide Chlorine dioxide Iodine dioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Reactions
Bromine dioxide is formed when an electric current is passed through a mixture of bromine and oxygen gases at low temperature and pressure.[4]
Bromine dioxide can also be formed by the treatment of bromine gas with ozone in trichlorofluoromethane at −50 °C.[1]
When mixed with a base, bromine dioxide gives the bromide and bromate anions:[4]