Zirconium(IV) bromide
Chemical compound
From Wikipedia, the free encyclopedia
Zirconium(IV) bromide is the inorganic compound with the formula ZrBr4. This colourless solid is the principal precursor to other Zr–Br compounds.
| Names | |
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| Other names
zirconium tetrabromide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.034.002 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| ZrBr4 | |
| Molar mass | 410.86 g/mol |
| Appearance | off-white powder |
| Density | 4.201 g/cm3, solid |
| Melting point | 450 °C (842 °F; 723 K) |
| Boiling point | sublimes |
| reacts with water | |
| Structure | |
| Cubic, cP40 | |
| P-43m, No. 205 | |
| Hazards | |
| GHS labelling: | |
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| 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 |
Zirconium(IV) fluoride Zirconium(IV) chloride Zirconium(IV) iodide |
Other cations |
Titanium tetrabromide Hafnium tetrabromide |
Related compounds |
Zirconium(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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Preparation and properties
ZrBr4 is prepared by the action of bromine on zirconium oxide via a carbothermic reaction:[1]
- ZrO2 + 2 C + 2 Br2 → ZrBr4 + 2 CO
Like many related tetrahalides, it is purified by sublimation.
It can also be prepared by treatment of the borohydride complex with hydrogen bromide:[2]
- Zr(BH4)4 + 4 HBr → ZrBr4 + 4 H2 + 2 B2H6
Like related tetrabromides of Ti and Hf, ZrBr4 hydrolyzes readily to give the oxybromide, with release of hydrogen bromide.