Zirconium(IV) bromide is the inorganic compound with the formula ZrBr4. This colourless solid is the principal precursor to other Zr–Br compounds.
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Other names
zirconium tetrabromide
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Identifiers | |
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3D model (JSmol)
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ECHA InfoCard | 100.034.002 |
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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 | |
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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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Zirconium(IV) fluoride Zirconium(IV) chloride Zirconium(IV) iodide |
Other cations
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Titanium tetrabromide Hafnium tetrabromide |
Related compounds
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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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Infobox references
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ZrBr4 is prepared by the action of bromine on zirconium oxide via a carbothermic reaction:[1]
Like many related tetrahalides, it is purified by sublimation.
It can also be prepared by treatment of the borohydride complex with hydrogen bromide:[2]
Like related tetrabromides of Ti and Hf, ZrBr4 hydrolyzes readily to give the oxybromide, with release of hydrogen bromide.
No single crystal X-ray study of ZrBr4 has been described. Some reports suggest that it is isostructural with TiCl4 and TiBr4, featuring tetrahedral metal centers.[3] Other studies indicate a polymeric structure.[4] ZrCl4 is polymeric in the solid state, featuring octahedral Zr centers.[5]
(from abstract): The structure was assumed to be similar to that of SnI4 ... was verified by comparing exptl. and calcd. line intensities, by using Cu K radiation for powder patterns. ... Based on the value of the radius of the I− ion, the lattice parameter and the theoretical sp. gravity of ZrI4 and HfI4 were calcd.