Gold compounds: digold hexabromide

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The gold in digold hexabromide formally is in the oxidation state 3.

Crystal structure of digold hexabromide

Digold hexabromide

  • Formula as often written: [AuBr3]2
  • Hill system formula: Au2Br6
  • CAS registry number: [10294-28-7]
  • Formula weight: 873.357
  • Class: bromide

Synonyms

  • digold hexabromide
  • gold(III) bromide
  • auric bromide
  • gold bromide
  • gold tribromide

Physical properties

  • Colour: red-brown
  • Appearance: crystalline solid
  • Melting point: 160°C (decomposes)
  • Boiling point:
  • Density:

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Element analysis

Element percentages for the elements in digold hexabromide
Element %
Au 45.11
Br 54.89

Synthesis

Au + Br2 (140°C) → Au2Br6

dimer [11092-53-8]

Solid state structure

  • Geometry of gold: 4 coordinate: square planar
  • Prototypical structure:

Crystal structure of digold hexabromide

Isotope pattern

What follows is the calculated isotope pattern for the [AuBr3]2 unit with the most intense ion set to 100%.

Formula: Au2Br6

mass  %
868   5.4 ___
869 0.0
870 31.7 ________________
871 0.0
872 77.1 _______________________________________
873 0.0
874 100.0 __________________________________________________
875 0.0
876 73.0 ____________________________________
877 0.0
878 28.4 ______________
879 0.0
880 4.6 __

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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