Zirconium compounds: zirconium tetrabromide

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The zirconium in zirconium tetrabromide formally is in the oxidation state 4.

Zirconium tetrabromide

  • Formula as often written: ZrBr4
  • Hill system formula: Br4Zr1
  • CAS registry number: [13777-25-8]
  • Formula weight: 410.84
  • Class: bromide

Synonyms

  • zirconium tetrabromide
  • zirconium(IV) bromide
  • zirconium bromide

Physical properties

  • Colour: white
  • Appearance: cystalline solid
  • Melting point: 450°C
  • Boiling point: 350°C; 250°C
  • Density: 3980 kg m-3

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Element analysis

Element percentages for the elements in zirconium tetrabromide
Element %
Br 77.80
Zr 22.20

Synthesis

ZrO2 + 2C + 2Br2 (560°C) → ZrBr4 + 2CO

Zirconium(IV) tetrabromide may be made through the direct reaction of the elements or by passing a stream of bromine in carbon dioxide over a mixture of zirconium(IV) oxide and sugar charcoal contained in a hot pyrex tube. Purification may be achieved by vacuum sublimation. The overall yield is about 60%. Zirconium(IV) bromide is a white crystalline solid that hydrolyses when dissolved in water.

Isotope pattern

What follows is the calculated isotope pattern for the ZrBr4 unit with the most intense ion set to 100%.

Formula: Zr1Br4

mass  %
406  13.7 _______
407 3.0 __
408 57.8 _____________________________
409 11.6 ______
410 100.0 __________________________________________________
411 16.9 ________
412 95.0 ________________________________________________
413 11.0 ______
414 58.2 _____________________________
415 2.7 _
416 25.3 _____________
417 0.0
418 6.9 ___
419 0.0
420 0.7

References

The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

  • R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
  • N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
  • F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
  • A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
  • R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
  • A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
  • A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
  • J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
  • D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
  • J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
  • J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.

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zirconium atomic number