Molar mass 254.77 g/mol Density 3.38 g/cm³ Melting point 41.6 °C | Formula SeOBr2 Boiling point 220 °C Appearance red-yellow solid | |
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Selenium oxybromide (SeOBr2) is a selenium oxohalide chemical compound.
Contents
Preparation
Selenium oxybromide can be prepared through the reaction of selenium dioxide and selenium tetrabromide. Selenium and selenium dioxide are reacted with bromine to form selenium monobromide and selenium tetrabromide. Dissolving the selenium dioxide in the tetrabromide will produce the oxybromide.
2 Se + Br2 → Se2Br2 Se2Br2 + 3 Br2 → SeBr4 SeBr4 + SeO2 → 2 SeOBr2Properties
Selenium oxybromide is a reddish-brown solid with a low melting point (41.6 °C) and chemical properties similar to selenium oxychloride. It boils at 220 °C and decomposes near the boiling point, making distillation an ineffective purification method. Its electrical conductivity in the liquid state just above the melting temperature is 6×10−5 S/m. SeOBr2 is hydrolyzed by water to form H2SeO3 and HBr.
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.