Caesium tribromide

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Caesium tribromide
Cesium tribromide.jpg
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.149.967 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 621-081-4
PubChem CID
  • InChI=1S/Br3.Cs/c1-3-2;/q-1;+1
    Key: AUOXCQZELVDUNB-UHFFFAOYSA-N
  • Br[Br-]Br.[Cs+]
Properties
CsBr3
Molar mass 372.617 g·mol−1
Appearance
  • Orange solid [1] : 8788 
  • Dark red crystals [2]
Melting point 38 °C (decomposes) [3]
Hazards
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H315, H319, H335
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Caesium tribromide is an inorganic compound with chemical formula Cs+ [ Br3]−. It can be obtained by crystallization from a concentrated aqueous solution of caesium bromide containing large amounts of bromine, [4] or by the hydrothermal reaction of caesium bromide, caesium bromate, and hydrobromic acid, in which bromine is generated in situ. [2]

It is isostructural with caesium triiodide and caesium diiodide bromide, and belongs to the orthorhombic Pmnb space group. [4]

It can oxidize some Au(I) complexes to Au(II) or Au(III) complexes. [1] [5]

References

  1. 1 2 Kriechbaum, Margit; Otte, Daniela; List, Manuela; Monkowius, Uwe (17 April 2014). "Facile oxidation of NHC-Au(I) to NHC-Au(III) complexes by CsBr3". Dalton Trans. 43 (23): 8781–8791. doi:10.1039/C4DT00695J. ISSN   1477-9226. PMID   24777298.
  2. 1 2 Lin, Yang-Peng; Huang, Xiao-Ying; Du, Ke-Zhao (March 2022). "Br2-free method for XBr3 (X = Cs, C8H20N, C16H36N) synthesis: Br2 solid storage and separation from aqueous solution". Materials Chemistry and Physics. 280. doi:10.1016/j.matchemphys.2022.125820.
  3. ↑ Harris, G.S.; McKechnie, J.S. (January 1982). "Thermogravimetric analysis and dissociation pressure of caesium trihalides". Polyhedron. 1 (2): 215–216. doi:10.1016/S0277-5387(00)80991-2.
  4. 1 2 Breneman, G. L.; Willett, R. D. (1 June 1969). "The crystal structure of caesium tribromide and a comparison of the Br−3 and I−3 systems". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 25 (6): 1073–1076. doi:10.1107/S0567740869003554. ISSN   0567-7408.
  5. ↑ Lane, Andrew; Barnes, Charles; Vollmer, Matthew; Walensky, Justin (8 October 2014). "Reactivity of Mononuclear and Dinuclear Gold(I) Amidinate Complexes with CS2 and CsBr3". Inorganics. 2 (4): 540–551. doi: 10.3390/inorganics2040540 . ISSN   2304-6740.

Further reading

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