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| Names | |
|---|---|
| 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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| UNII | |
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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: | |
    | |
| 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 | |
Otheranions | Selenium tetrafluoride Selenium tetrachloride |
Othercations | Tellurium tetrabromide |
Related compounds | Selenium dibromide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Selenium tetrabromide is aninorganic compound with achemical formula SeBr4.
Selenium tetrabromide could be produced by mixing elementalbromine andselenium:[2][3]
Selenium tetrabromide exists in twopolymorphs, thetrigonal, black α-SeBr4 and themonoclinic, orange-reddish β-SeBr4, both of which feature tetramericcubane-like Se4Br16 units but differ in how they are arranged.[1] It dissolves incarbon disulfide,chloroform andethyl bromide, but decomposes in water,[4] so that it producesselenous 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]