Bromine dioxide

{{redirect|BrO2|the oxyanion with the formula BrO{{su|b=2|p=−}}|Bromite}}

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 428832706

| Name = Bromine dioxide

| ImageFile1 = Bromine-dioxide-radical-resonance-hybrid-2D.png

| ImageSize1 = 150px

| ImageName1 =

| ImageFile2 = Bromine-dioxide-MP2-CM-3D-balls.png

| ImageSize2 = 150px

| IUPACName = Bromine dioxide

| OtherNames =

| Section1 = {{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 21255-83-4

| RTECS =

| PubChem = 5460629

| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}

| ChemSpiderID = 4574124

| SMILES = O=Br=O

| InChI = 1/BrO2/c2-1-3

| InChIKey = SISAYUDTHCIGLM-UHFFFAOYAZ

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/BrO2/c2-1-3

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| StdInChIKey = SISAYUDTHCIGLM-UHFFFAOYSA-N

}}

| Section2 = {{Chembox Properties

| Formula = BrO₂

| MolarMass = 111.903 g/mol

{{Citation

| last1 = Perry

| first1 = Dale L.

| last2 = Phillips

| first2 = Sidney L.

| year = 1995

| title = Handbook of Inorganic Compounds

| publisher = CRC Press

| isbn = 0-8493-8671-3

| pages = 74

| url = https://books.google.com/books?id=0fT4wfhF1AsC&q=%22Bromine+dioxide%22&pg=PA74

| access-date = 17 March 2009

}}

| Appearance = unstable yellow crystals

| Density =

| Solubility =

| MeltingPt = decomposes around 0°C

{{Citation

| last = Lide

| first = David R.

| year = 1998

| title = Handbook of Chemistry and Physics

| edition = 87

| location = Boca Raton, Florida

| publisher = CRC Press

| isbn = 0-8493-0594-2

| pages = 447

}}

| BoilingPt =

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| Section3 = {{Chembox Structure

| MolShape =

| Coordination =

| CrystalStruct =

| Dipole =

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| Section7 = {{Chembox Hazards

| NFPA-H =

| NFPA-F =

| NFPA-R =

| FlashPt =

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| Section8 = {{Chembox Related

| OtherAnions = Bromine monoxide
Bromine trifluoride
Bromine pentafluoride

| OtherCations = Oxygen difluoride
Dichlorine monoxide
Chlorine dioxide
Iodine dioxide

}}

}}

Bromine dioxide is the chemical compound composed of bromine and oxygen with the formula BrO₂. It forms unstable yellow to yellow-orange crystals. It was first isolated by R. Schwarz and M. Schmeißer in 1937 and is hypothesized to be important in the atmospheric reaction of bromine with ozone.{{cite journal|last1=Müller|first1=Holger S. P.|last2=Miller|first2=Charles E.|last3=Cohen|first3=Edward A.|title=The rotational spectrum and molecular properties of bromine dioxide, OBrO|journal=The Journal of Chemical Physics|volume=107|issue=20|year=1997|pages=8292|issn=0021-9606|doi=10.1063/1.475030|bibcode=1997JChPh.107.8292M }}

It is similar to chlorine dioxide, the dioxide of its halogen neighbor one period higher on the periodic table.{{cn|date=September 2023}}

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