Bromous acid

Bromous acid

200px
Space-filling model of the bromous acid molecule
Names
IUPAC names hydroxy-λ3-bromanone hydroxidooxidobromine bromous acid
Identifiers
CAS Number	37691-27-3 N
ChEBI	CHEBI:29247 Y
ChemSpider	145144 Y
Jmol 3D model	Interactive image
PubChem	165616
InChI InChI=1S/BrHO2/c2-1-3/h(H,2,3) Y Key: DKSMCEUSSQTGBK-UHFFFAOYSA-N Y InChI=1/BrHO2/c2-1-3/h(H,2,3) Key: DKSMCEUSSQTGBK-UHFFFAOYAC
SMILES O=BrO
Properties
Chemical formula	HBrO2
Molar mass	112.911 g/mol
Vapor pressure	{{{value}}}
Related compounds
Other anions	Hydrobromic acid; hypobromous acid; bromic acid; perbromic acid
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

Bromous acid is an acid with the formula HBrO₂. It has bromine in the +3 oxidation state. The salts of bromous acid are called bromites. The acid is not stable and only occurs as an intermediate; for example, in the oxidation of hypobromites.

Chemistry

Bromous acid can be produced by classical chemical or electrochemicals method via anodic oxidation.

HBrO + HClO → HBrO₂ + HCl

Also disproportioning of hypobromous acid will give bromous acid and hydrobromic acid.

2 HBrO → HBrO₂ + HBr

Lastly, a synproportion reaction of bromic acid and hydrobromic acid gives bromous acid.

2 HBrO₃ + HBr → 3 HBrO₂

Compounds

Several bromites are stable and have been isolated. For example NaBrO₂· 3H₂O and Ba(BrO₂)₂·H₂O.

Use

Bromites can be used for the reduction of permanganates to manganates.

2MnO⁻
₄ + BrO⁻
₂ + OH⁻ → 2MnO²⁻
₄ + BrO⁻
₃ + H₂O