Selenium oxybromide

Selenium oxybromide
	Selenium oxybromide
Identifiers
CAS Number	7789-51-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	74220 ;
ECHA InfoCard	100.029.247
PubChem CID	82242;
UNII	B4NK717O2R ;
CompTox Dashboard (EPA)	DTXSID2064866 ;
	InChI InChI=1S/Br2OSe/c1-4(2)3 Key: ZWTYAOCEBBZVQQ-UHFFFAOYSA-N ; InChI=1/Br2OSe/c1-4(2)3 Key: ZWTYAOCEBBZVQQ-UHFFFAOYAF;
	SMILES Br[Se](Br)=O;
Properties
Chemical formula	SeOBr2
Molar mass	254.77 g/mol
Appearance	red-yellow solid
Density	3.38 g/cm3, solid
Melting point	41.6 °C (106.9 °F; 314.8 K)
Boiling point	decomposes at 220 °C (428 °F; 493 K)
Solubility in water	reacts
Solubility	soluble in carbon disulfide, benzene, carbon tetrachloride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Selenium oxybromide (Se O Br₂) is a selenium oxohalide chemical compound.^[2]

Preparation

Selenium oxybromide can be prepared through the reaction of selenium dioxide and selenium tetrabromide. Selenium and selenium dioxide are reacted with bromine to form selenium monobromide and selenium tetrabromide. Dissolving the selenium dioxide in the tetrabromide will produce the oxybromide.^[3]

2 Se + Br₂ → Se₂Br₂

Se₂Br₂ + 3 Br₂ → 2 SeBr₄

SeBr₄ + SeO₂ → 2 SeOBr₂

Structure

Evidence from infrared and polarized Raman spectroscopy suggests that selenium oxybromide adopts a pyramidal molecular geometry with C_s symmetry,^[4] like other chalcogen(IV) oxohalides such as thionyl bromide (SOBr₂) and selenium oxydichloride (SeOCl₂).^[2]

Properties

Selenium oxybromide is a reddish-brown solid with a low melting point (41.6 °C) and chemical properties similar to selenium oxychloride. It boils at 220 °C and decomposes near the boiling point, making distillation an ineffective purification method. Its electrical conductivity in the liquid state just above the melting temperature is 6×10⁻⁵ S/m. SeOBr₂ is hydrolyzed by water to form H₂SeO₃ and HBr.

SeOBr₂ is highly reactive, with most reactions taking place in the liquid state. Selenium will dissolve in it, forming Se₂Br₂. Iron, copper, gold, platinum, and zinc are all attacked by SeOBr₂.^[3]

References

^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–81. ISBN 0-8493-0594-2.
^ ^a ^b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 777. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.
^ ^a ^b Lenher, Victor (1 August 1922). "Selenium oxybromide". Journal of the American Chemical Society. 44 (8): 1668–1673. doi:10.1021/ja01429a008.
^ Wilson, William W. (1972). Vibrational spectroscopic studies of some simple and mixed selenium(iv) oxy-halides and pseudohalides (MSc). University of British Columbia. doi:10.14288/1.0061859.

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[hand-1] Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. pp. 4–81. ISBN 0-8493-0594-2.

[G&E-2] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 777. doi:10.1016/C2009-0-30414-6. ISBN 978-0-08-037941-8.

[lenher-1922-3] Lenher, Victor (1 August 1922). "Selenium oxybromide". Journal of the American Chemical Society. 44 (8): 1668–1673. doi:10.1021/ja01429a008.

[4] Wilson, William W. (1972). Vibrational spectroscopic studies of some simple and mixed selenium(iv) oxy-halides and pseudohalides (MSc). University of British Columbia. doi:10.14288/1.0061859.

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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(III)	Se₄N₄
Se(IV)	SeO2−3 SeBr₄ SeCl₄ SeF₄ SeO₂ SeS₂ SeOF₂ SeOCl₂ SeOBr₂ H₂SeO₃
Se(VI)	SeO2−4 SeF₆ SeO₃ SeO₂F₂ H₂SeO₄
Se(IV,VI)	SeO2−4 + SeO2−3

Selenium oxybromide

Selenium oxybromide

Selenium oxybromide

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Hub overview

Root Wikipedia Article

Selenium oxybromide

Preparation

Structure

Properties

References

Identifiers
Selenium oxybromide
CAS Number	7789-51-7^Y
3D model (JSmol)	Interactive image
ChemSpider	74220^Y
ECHA InfoCard	100.029.247
PubChem CID	82242
UNII	B4NK717O2R^Y
CompTox Dashboard (EPA)	DTXSID2064866
InChI InChI=1S/Br2OSe/c1-4(2)3^Y Key: ZWTYAOCEBBZVQQ-UHFFFAOYSA-N^Y InChI=1/Br2OSe/c1-4(2)3 Key: ZWTYAOCEBBZVQQ-UHFFFAOYAF
SMILES Br[Se](Br)=O
Properties
Chemical formula	SeOBr₂
Molar mass	254.77 g/mol
Appearance	red-yellow solid
Density	3.38 g/cm³, solid
Melting point	41.6 °C (106.9 °F; 314.8 K)
Boiling point	decomposes at 220 °C (428 °F; 493 K)
Solubility in water	reacts
Solubility	soluble in carbon disulfide, benzene, carbon tetrachloride^[1]
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