Dibromine trioxide

Dibromine trioxide is the chemical compound composed of bromine and oxygen with the formula Br₂O₃. It is an orange solid that is stable below −40 °C. It has the structure Br−O−BrO₂ (bromine bromate).^[3] It was discovered in 1993.^[2] The bond angle of Br−O−Br is 111.7°, the bond angle of O−Br=O is 103.1°, and the bond angle of O=Br=O is 107.6°. The Br−OBrO₂ bond length is 1.845 Å, the O−BrO₂ bond length is 1.855 Å and the Br=O bond length is 1.612 Å.^[4]

Dibromine trioxide

Names
IUPAC name Dibromine trioxide
Other names Bromine trioxide Bromine bromate
Identifiers
CAS Number	53809-75-9 Y
3D model (JSmol)	Interactive image
ChemSpider	11564402
PubChem CID	15779614
InChI InChI=1S/Br2O3/c1-5-2(3)4 Key: XLGPPSYTBHJSNE-UHFFFAOYSA-N
SMILES BrO[Br](=O)=O
Properties
Chemical formula	Br2O3
Molar mass	207.806 g/mol
Appearance	orange needles
Melting point	decomposes around −40°C[1]
Structure[2]
Crystal structure	monoclinic
Space group	P21/c
Lattice constant	a = 1186.6 pm, b = 762.9 pm, c = 869.3 pm α = 90°, β = 106.4°, γ = 90°
Related compounds
Other anions	Bromine dioxide Bromine trifluoride Bromine pentafluoride
Other cations	Oxygen difluoride Dichlorine monoxide Chlorine dioxide Iodine dioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N (what is YN ?) Infobox references

Reactions

Dibromine trioxide can be prepared by reacting a solution of bromine in dichloromethane with ozone at low temperatures.^[3][5] It disproportionates in alkali solutions to Br⁻
and BrO⁻
₃.^[5]