Selenium dibromide
{{Chembox
| Reference =
| Name = Selenium dibromide
| IUPACName = Bromo selenohypobromite
| PIN =
| SystematicName =Selenium dibromide
| OtherNames =
| ImageFile = Selenium-dibromide-from-GED-3D-bs-17.png
| ImageSize =
| ImageAlt =
| ImageName =
| Section1 = {{Chembox Identifiers
| 3DMet =
| Abbreviations =
| Beilstein =
| CASNo = 22987-45-7
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo_Comment =
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 6WRB0BWV8E
| ChEBI =
| ChemSpiderID =
| EINECS =
| EC_number =
| EC_number_Comment =
| Gmelin =
| InChI = 1S/Br2Se/c1-3-2
| InChIKey =
| KEGG =
| MeSHName =
| PubChem = 140977
| RTECS =
| SMILES = [Se](Br)Br
| UNNumber =
}}
| Section2 = {{Chembox Properties
| AtmosphericOHRateConstant =
| Appearance =
| BoilingPt =
| BoilingPtC =
| BoilingPt_ref =
| BoilingPt_notes =
| Density =
| Br=2 | Se=1
| HenryConstant =
| LogP =
| MeltingPt =
| MeltingPtC =
| MeltingPt_ref =
| MeltingPt_notes =
| pKa =
| pKb =
| Solubility =
| SolubleOther =
| Solvent =
| VaporPressure =
}}
| Section3 = {{Chembox Structure
| Coordination =
| CrystalStruct =
| MolShape =
}}
| Section4 = {{Chembox Thermochemistry
| DeltaGf =
| DeltaHc =
| DeltaHf =
| Entropy =
| HeatCapacity =
}}
| Section5 = {{Chembox Explosive
| ShockSens =
| FrictionSens =
| DetonationV =
| REFactor =
}}
| Section7 = {{Chembox Hazards
| AutoignitionPt =
| ExploLimits =
| ExternalMSDS =
| FlashPt =
| LD50 =
| LC50 =
| MainHazards =
| NFPA-F =
| NFPA-H =
| NFPA-R =
| NFPA-S =
| PEL =
| REL =
| HPhrases =
| PPhrases =
| GHS_ref =
}}
| Section9 = {{Chembox Related
| OtherAnions =
| OtherCations =
| OtherFunction =
| OtherFunction_label =
| OtherCompounds =
}}
|Section8={{Chembox Related
| OtherAnions=Selenium dichloride, {{chem2|SeCl2}}
| OtherCations=Sulfur dibromide, {{chem2|SBr2}}
| OtherCompounds=Selenium tetrabromide, {{chem2|SeBr4}}
}}
}}
Selenium dibromide is a compound made of one selenium and two bromine atoms. It is unstable. No solid form of the compound has been discovered but it is a component of the equilibria in the vapour above selenium tetrabromide ({{chem2|SeBr4}}) and in nonaqueous solutions.{{Greenwood&Earnshaw2nd|pages=768, 771–772}} In acetonitrile solution, selenium reacts with {{chem2|SeBr4}} to form an equilibrium mixture containing {{chem2|SeBr2}}, {{chem2|Se2Br2}} and {{chem2|Br2}}.{{ cite journal | first1 = Ralf | last1 = Steudel | first2 = Detlef | last2 = Jensen | first3 = Frank | last3 = Baumgart | title = 77Se-NMR and raman spectroscopic characterization of selenium dibromide (SeBr2) and its reaction with titanocene pentasulphide to give cyclic selenium sulphides of ring size 6, 7, 8, and 12 | journal = Polyhedron | volume = 9 | issue = 9 | year = 1990 | pages = 1199–1208 | doi = 10.1016/S0277-5387(00)86896-5 }} This covalent compound has a bent molecular geometry in the gas phase.{{cite journal |last1= Shlykov |first1= Sergey A. |last2= Titov |first2= Anton V. |last3= Oberhammer |first3= Heinz |last4= Giricheva |first4= Nina I. |last5= Girichev |first5= Georgiy V. |title= The molecular structure of selenium dibromide as determined by combined gas-phase electron diffraction–mass spectrometric experiments and quantum chemical calculations |journal= Phys. Chem. Chem. Phys. |year= 2008 |volume= 10 |issue= 42 |pages= 6438–6445 |doi= 10.1039/B808071B |pmid= 18972032 |bibcode= 2008PCCP...10.6438S }}