Selenium dibromide

Selenium dibromide
Names
	IUPAC name Bromo selenohypobromite
	Systematic IUPAC name Selenium dibromide
Identifiers
CAS Number	22987-45-7 ;
3D model (JSmol)	Interactive image;
PubChem CID	140977;
UNII	6WRB0BWV8E ;
CompTox Dashboard (EPA)	DTXSID30177532 ;
	InChI InChI=1S/Br2Se/c1-3-2;
	SMILES (Br)Br;
Properties
Chemical formula	Br2Se
Molar mass	238.779 g·mol−1
Related compounds
Other anions	Selenium dichloride, SeCl2
Other cations	Sulfur dibromide, SBr2
Related compounds	Selenium tetrabromide, SeBr4
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

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 (SeBr₄) and in nonaqueous solutions.^[1] In acetonitrile solution, selenium reacts with SeBr₄ to form an equilibrium mixture containing SeBr₂, Se₂Br₂ and Br₂.^[2] This covalent compound has a bent molecular geometry in the gas phase.^[3]

References

^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 768, 771–772. ISBN 978-0-08-037941-8.
^ Steudel, Ralf; Jensen, Detlef; Baumgart, Frank (1990). "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". Polyhedron. 9 (9): 1199–1208. doi:10.1016/S0277-5387(00)86896-5.
^ Shlykov, Sergey A.; Titov, Anton V.; Oberhammer, Heinz; Giricheva, Nina I.; Girichev, Georgiy V. (2008). "The molecular structure of selenium dibromide as determined by combined gas-phase electron diffraction–mass spectrometric experiments and quantum chemical calculations". Phys. Chem. Chem. Phys. 10 (42): 6438–6445. Bibcode:2008PCCP...10.6438S. doi:10.1039/B808071B. PMID 18972032.

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[1] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 768, 771–772. ISBN 978-0-08-037941-8.

[2] Steudel, Ralf; Jensen, Detlef; Baumgart, Frank (1990). "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". Polyhedron. 9 (9): 1199–1208. doi:10.1016/S0277-5387(00)86896-5.

[3] Shlykov, Sergey A.; Titov, Anton V.; Oberhammer, Heinz; Giricheva, Nina I.; Girichev, Georgiy V. (2008). "The molecular structure of selenium dibromide as determined by combined gas-phase electron diffraction–mass spectrometric experiments and quantum chemical calculations". Phys. Chem. Chem. Phys. 10 (42): 6438–6445. Bibcode:2008PCCP...10.6438S. doi:10.1039/B808071B. PMID 18972032.

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v t e Selenium compounds
Se(−II)	Se²⁻ H₂Se Al₂Se₃ Sb₂Se₃ As₂Se₃ Bi₂Se₃ CdSe CaSe CSe₂ OCSe CrSe CoSe CuSe (CH₃)₂Se GaSe Ga₂Se₃ GeSe In₂Se₃ FeSe PbSe MgSe MnSe MnSe₂ HgSe MoSe₂ NiSe NbSe₂ NbSe₃ P_xSe_y PuSe ReSe₂ Sm₂Se₃ Ag₂Se Na₂Se SnSe TiSe₂ WSe₂ USe₂ ZnSe
Se(0,I)	Se₃S₅
Se(I)	Se₂S₆ Se₂Cl₂ C₃H₇NO₂Se
Se(II)	SeBr₂ SeCl₂ SeS₂
Se(IV)	SeO2−3 SeBr₄ SeCl₄ SeF₄ SeO₂ SeS₂ SeOBr₂ SeOCl₂ H₂SeO₃
Se(VI)	SeO2−4 SeF₆ SeO₃ SeO₂F₂ H₂SeO₄
Se(IV,VI)	SeO2−4 + SeO2−3