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Names | |||
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IUPAC name
bismuth bromide
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Other names
bismuth tribromide
tribromobismuth tribromobismuthine tribromobismuthane bismuth(III) bromide | |||
Identifiers | |||
3D model (
JSmol)
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ChemSpider | |||
ECHA InfoCard | 100.029.201 | ||
EC Number |
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PubChem
CID
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UNII | |||
CompTox Dashboard (
EPA)
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Properties | |||
BiBr3 | |||
Molar mass | 448.692 g·mol−1 | ||
Appearance | white to light yellow or golden deliquescent crystals [1] | ||
Density | 5.72 g/cm3 at 25 °C [1] | ||
Melting point | 219 °C (426 °F; 492 K) [1] | ||
Boiling point | 462 °C (864 °F; 735 K) [1] | ||
Soluble, slow hydrolysis | |||
Solubility | diethyl ether, THF | ||
-147.0·10−6 cm3/mol | |||
Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
−276 [1] | ||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards
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corrosive [2] | ||
GHS labelling: | |||
Danger | |||
H314 | |||
P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Related compounds | |||
Other
anions
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bismuth trifluoride bismuth trichloride bismuth triiodide | ||
Other
cations
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nitrogen tribromide phosphorus tribromide arsenic tribromide antimony tribromide aluminium tribromide iron(III) bromide | ||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Bismuth tribromide is an inorganic compound of bismuth and bromine with the chemical formula BiBr3.
It may be formed by the reaction of bismuth oxide and hydrobromic acid. [1]
Bismuth tribromide can also be produced by the direct oxidation of bismuth in bromine. [1]
Bismuth tribromide adopts two different structures in the solid state: a low-temperature polymorph α-BiBr3 that is stable below 158 °C and a high-temperature polymorph β-BiBr3 that is stable above this temperature. Both polymorphs are monoclinic, but α-BiBr3 is in space group P21/a whereas β-BiBr3 is in C2/m. α-BiBr3 consists of pyramidal molecules whereas β-BiBr3 is polymeric and adopts the AlCl3 structure. BiBr3 is the only group 15 trihalide that can adopt both molecular and polymeric structures. [3]
Bismuth bromide is highly water-soluble. It is a
Lewis acid and accepts bromide ions to form monomeric and oligomeric anionic complexes (bromobismuthates), e.g. [BiBr63−, [Bi2Br104−, (BiBr−
4)n and (BiBr2−
5)n.
[4]