Zirconium(IV) bromide

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Zirconium(IV) bromide
Zirconium(IV) bromide
Other names
zirconium tetrabromide
3D model (JSmol)
ECHA InfoCard 100.034.002
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
Cubic, cP40
P-43m, No. 205
not listed
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g., phosphorus Special hazards (white): no codeNFPA 704 four-colored diamond
Related compounds
Other anions
Zirconium(IV) fluoride
Zirconium(IV) chloride
Zirconium(IV) iodide
Other cations
Titanium tetrabromide
Hafnium tetrabromide
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

Zirconium(IV) bromide is the inorganic compound with the formula ZrBr4. This colourless solid is the principal precursor to other Zr–Br compounds.

Preparation and properties[edit]

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.

Like related tetrabromides of Ti and Hf, ZrBr4 hydrolyzes readily to give oxy-bromide, with release of hydrogen bromide.


ZrBr4 adopts the structure seen for the related compounds, TiCl4 and TiBr4, featuring tetrahedral Zr centers. In contrast, ZrCl4 is polymeric in the solid state, featuring octahedral Zr centers.[2]


  1. ^ R. C. Young, Hewitt G. Fletcher, "Anhydrous Zirconium Tetrabromide" Inorganic Syntheses, 1939, vol. 1, pp. 49–51. doi:10.1002/9780470132326.ch18
  2. ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.