Names | |
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IUPAC name
Bromine dioxide
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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
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Bromine monoxide Bromine trifluoride Bromine pentafluoride |
Other
cations
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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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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]
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]