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Names | |
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IUPAC name Tetrabromo-λ4-selane | |
Other names Selenium tetrabromide, selenium(IV) bromide | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.029.256 |
EC Number |
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PubChem CID | |
UNII | |
CompTox Dashboard (EPA) | |
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Properties | |
SeBr4 | |
Molar mass | 398.576 |
Density | 4.029 g/cm3 |
Melting point | 75 °C (167 °F; 348 K) (dissolves) |
Boiling point | 115 °C (239 °F; 388 K) (sublimes) |
Structure [1] | |
trigonal (α) monoclinic (β) | |
P31c, No. 159 (α) C2/c, No.15 (β) | |
Formula units (Z) | 16 |
Hazards | |
GHS labelling: | |
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Danger | |
H301, H311, H314, H331, H351, H373, H410 | |
P201, P202, P260, P261, P264, P270, P271, P273, P280, P281, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P311, P312, P314, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501 | |
Related compounds | |
Other anions | Selenium tetrafluoride Selenium tetrachloride |
Other cations | Tellurium tetrabromide |
Related compounds | Selenium dibromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Selenium tetrabromide is an inorganic compound with a chemical formula SeBr4.
Selenium tetrabromide could be produced by mixing elemental bromine and selenium: [2] [3]
Selenium tetrabromide exists in two polymorphs, the trigonal, black α-SeBr4 and the monoclinic, orange-reddish β-SeBr4, both of which feature tetrameric cubane-like Se4Br16 units but differ in how they are arranged. [1] It dissolves in carbon disulfide, chloroform and ethyl bromide, but decomposes in water, [4] so that it produces selenous acid in wet air.
The compound is only stable under a bromine-saturated atmosphere; gas phase measurements of the gas density indicate that the compound decomposes into selenium monobromide and bromine. [3]