Dibromine monoxide

Names
IUPAC name

Dibromine monoxide

Systematic IUPAC name

Bromohypobromite

Other names

Dibromine oxide, bromine monoxide

Identifiers

CAS Number

* 21308-80-5 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 10686917

PubChem CID

* 14513628

InChI

* InChI=1S/Br2O/c1-3-2

Key: HJCMMOODWZOXML-UHFFFAOYSA-N

SMILES

* O(Br)Br

Properties

Chemical formula

| Br2O
Molar mass | 175.807 g/mol
Appearance  | dark brown solid
Melting point | decomposes around −17.5°C[1]
Related compounds

Related compounds

* Water
* Oxygen difluoride
* Dichlorine monoxide
* Diiodine monoxide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Dibromine monoxide is the chemical compound composed of bromine and oxygen with the formula Br2O. It is a dark brown solid which is stable below −40 °C and is used in bromination reactions.[1] It is similar to dichlorine monoxide, the monoxide of its halogen neighbor one period higher on the periodic table. The molecule is bent, with C2v molecular symmetry. The Br−O bond length is 1.85 Å and the Br−O−Br bond angle is 112°,[2][3] similar to dichlorine monoxide.

## Reactions

Dibromine monoxide can be prepared by reacting bromine vapor or a solution of bromine in carbon tetrachloride with mercury(II) oxide at low temperatures:[1][3]

2 Br2 \+ 2 HgO → HgBr2·HgO + Br2O

It can also be formed by thermal decomposition of bromine dioxide[2] or by passing an electrical current through a 1:5 mixture of bromine and oxygen gases.[3]

## References

1. ↑ 1.0 1.1 1.2 Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 74, ISBN 0-8493-8671-3, https://books.google.com/books?id=0fT4wfhF1AsC&q="Bromine+dioxide"&pg=PA74, retrieved 25 August 2015
2. ↑ 2.0 2.1 Levason, William; Ogden, J. Steven; Spicer, Mark D.; Young, Nigel A. (January 1990). "Characterization of dibromine monoxide (Br2O) by bromine K-edge EXAFS and IR spectroscopy". Journal of the American Chemical Society 112 (3): 1019–1022. doi:10.1021/ja00159a019.
3. ↑ 3.0 3.1 3.2 Wiberg, Egon (2001). Wiberg, Nils. ed. Inorganic chemistry (1st ed.). San Diego, Calif.: Academic Press. pp. 464. ISBN 9780123526519.

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Bromine compounds

* AgBr
* AlBr3
* AmBr3
* AsBr3
* AuBr3
* BBr3
* B2Br4
* BaBr2
* BeBr2
* BiBr3
* BrCl
* CsBr
* BrF3
* BrF5
* HBr
* IBr
* KBr
* LiBr
* BrN3
* NaBr
* BrO2
* RbBr
* TlBr
* CaBr2
* CdBr2
* CoBr2
* CuBr2
* EuBr2
* FeBr2
* GeBr2
* HgBr2
* Hg2Br2
* MgBr2
* MnBr2
* NiBr2
* Br2O
* Br2O3
* Br2O5
* PbBr2
* PdBr2
* PtBr2
* RaBr2
* S2Br2
* Se2Br2
* SnBr2
* SrBr2
* TeBr2
* YbBr2
* ZnBr2
* CeBr3
* CrBr3
* CsBr3
* DyBr3
* ErBr3
* EuBr3
* FeBr3
* GaBr3
* GdBr3
* HoBr3
* InBr
* InBr3
* IrBr3
* LaBr3
* LuBr3
* MoBr3
* NBr3
* NdBr3
* PBr3
* PrBr3
* ReBr3
* SbBr3
* SmBr3
* TbBr3
* TmBr3
* UBr3
* VBr3
* YBr3
* YbBr3
* GeBr4
* HfBr4
* PbBr4
* SeBr4
* SiBr4
* SnBr4
* TeBr4
* ThBr4
* TiBr4
* UBr4
* WBr4
* ZrBr4
* NbBr5
* PBr5
* TaBr5
* UBr5
* WBr5
* CBr4
* CrBr2
* DyBr2
* HfBr2
* HfBr3

Chemical formulas

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