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Dibromine monoxide

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Dibromine monoxide
Names
IUPAC name Dibromine monoxide
Systematic IUPAC name Bromohypobromite
Other names Dibromine oxide, bromine monoxide
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
InChI
  • InChI=1S/Br2O/c1-3-2Key: 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
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

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. 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°, 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:

2 Br2 + 2 HgO → HgBr2·HgO + Br2O

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

References

  1. ^ Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, p. 74, ISBN 0-8493-8671-3, retrieved 25 August 2015
  2. ^ 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. ^ Wiberg, Egon (2001). Wiberg, Nils (ed.). Inorganic chemistry (1st ed.). San Diego, Calif.: Academic Press. p. 464. ISBN 9780123526519.
Bromine compounds
Br(−I)
Br(−I,I)
Br(I)
Br(II)
Br(I,V)
Br(III)
Br(IV)
Br(V)
Br(VII)


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