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| Names | |
|---|---|
| IUPAC name Dibromine monoxide | |
| Systematic IUPAC name Bromo hypobromite | |
| Other names Dibromine oxide, bromine monoxide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
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| Properties | |
| Br2O | |
| Molar mass | 175.807 g/mol |
| Appearance | dark brown solid |
| Melting point | decomposes around −17.5°C[1] |
| Related compounds | |
Related compounds | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Dibromine monoxide is thechemical compound composed ofbromine andoxygen with theformula Br2O. It is a dark brown solid which is stable below −40 °C and is used in bromination reactions.[1] It is similar todichlorine monoxide, the monoxide ofits halogen neighbor one period higher on theperiodic table. The molecule is bent, with C2vmolecular symmetry. The Br−Obond length is 1.85 Å and the Br−O−Br bond angle is 112°,[2][3] similar todichlorine monoxide.
Dibromine monoxide can be prepared by reacting bromine vapor or a solution of bromine incarbon tetrachloride withmercury(II) oxide at low temperatures:[1][3]
It can also be formed bythermal decomposition ofbromine dioxide[2] or by passing an electrical current through a 1:5 mixture of bromine and oxygen gases.[3]
