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Selenium tetrabromide is an inorganic compound with a chemical formula SeBr4.

Preparation

Selenium tetrabromide could be produced by mixing elemental bromine and selenium:[2][3]

Properties

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]

References

  1. ^ a b Born, Ref. P.; Kniep, R.; Mootz, D. (1979). "Phasenbeziehungen im System Se-Br und die Kristallstrukturen des dimorphen SeBr4". Z. Anorg. Allg. Chem. 451 (1): 12–24. doi:10.1002/zaac.19794510103.
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 772–774. ISBN 978-0-08-037941-8.
  3. ^ a b Tideswell, N. W.; McCullough, J. D. (1956). "Selenium Bromides. I. A Spectrophotometric Study of the Dissociation of Selenium Tetrabromide and Selenium Dibromide in Carbon Tetrachloride Solution1,2". Journal of the American Chemical Society. 78 (13): 3026–3029. doi:10.1021/ja01594a025.
  4. ^ Perry, Dale L. (2011). Handbook of Inorganic Compounds. CRC Press. p. 360. ISBN 978-1-4398-1461-1.
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