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| Identifiers | |
|---|---|
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.029.247 |
| UNII | |
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| Properties | |
| SeOBr2 | |
| Molar mass | 254.77 g/mol |
| Appearance | red-yellow solid |
| Density | 3.38 g/cm3, solid |
| Melting point | 41.6 °C (106.9 °F; 314.8 K) |
| Boiling point | decomposes at 220 °C (428 °F; 493 K) |
| reacts | |
| Solubility | soluble incarbon disulfide,benzene,carbon tetrachloride[1] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Selenium oxybromide (SeOBr2) is aseleniumoxohalidechemical compound.[2]
Selenium oxybromide can be prepared through the reaction ofselenium dioxide andselenium tetrabromide. Selenium and selenium dioxide are reacted withbromine to form selenium monobromide and selenium tetrabromide. Dissolving the selenium dioxide in the tetrabromide will produce the oxybromide.[3]
Evidence frominfrared andpolarized Raman spectroscopy suggests that selenium oxybromide adopts apyramidal molecular geometry withCs symmetry,[4] like other chalcogen(IV) oxohalides such asthionyl bromide (SOBr2) andselenium oxydichloride (SeOCl2).[2]
Selenium oxybromide is a reddish-brown solid with a low melting point (41.6 °C) and chemical properties similar toselenium oxychloride. It boils at 220 °C and decomposes near the boiling point, making distillation an ineffective purification method. Itselectrical conductivity in the liquid state just above the melting temperature is 6×10−5 S/m. SeOBr2 ishydrolyzed by water to formH2SeO3 andHBr.
SeOBr2 is highly reactive, with most reactions taking place in the liquid state. Selenium will dissolve in it, forming Se2Br2. Iron, copper, gold, platinum, and zinc are all attacked by SeOBr2.[3]
