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Zirconium(IV) bromide

| NFPA-H = 3 | NFPA-R = 2 | NFPA-F = 0 Zirconium(IV) chloride Zirconium(IV) iodide Hafnium tetrabromide

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

ZrBr4 is prepared by the action of bromine on zirconium oxide via a carbothermic reaction: : ZrO2 + 2C + 2Br2 → ZrBr4 + 2CO Like many related tetrahalides, it is purified by sublimation.

It can also be prepared by treatment of the borohydride complex with hydrogen bromide: : Zr(BH4)4 + 4HBr → ZrBr4 + 4H2 + 2B2H6

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

Structure

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.{{cite journal|title=Structure of Zr and Hf Tetrabromides|author1=Berdonosov, S. S. |author2=Lapitskii, A. V.

References

References

  1. R. C. Young, Hewitt G. Fletcher, "Anhydrous Zirconium Tetrabromide" Inorganic Syntheses, 1939, vol. 1, pp. 49–51. {{doi. 10.1002/9780470132326.ch18
  2. (1990). "Arene derivatives of zirconium(II) and hafnium(II)". Journal of the Chemical Society, Dalton Transactions.
  3. (1974). "Nuclear quadrupole resonance in hafnium and zirconium tetrabromide". Journal of the Chemical Society, Chemical Communications.
  4. A. F. Wells. (1984). "Structural Inorganic Chemistry". Oxford: Clarendon Press.
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bromides zirconium(iv)-compounds metal-halides
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