Gold(II) sulfate

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Gold(II) sulfate
Gold(II) sulfate structure.png
Structure of gold(II) sulfate(Red spheres: Au; Yellow spheres: S; Blue spheres: O)
Names
Other names
  • Gold sulfate
  • Digold disulfate
Identifiers
3D model (JSmol)
  • InChI=1S/2Au.2H2O4S/c;;2*1-5(2,3)4/h;;2*(H2,1,2,3,4)/q2*+2;;/p-4
    Key: AVQFVNHKHZLJOY-UHFFFAOYSA-J
  • [O-]S(=O)(=O)[O-].[Au+2][Au+2].[O-]S(=O)(=O)[O-]
Properties
Molar mass 293.03 g/mol
AppearanceRed crystals
Density 5.51 g/cm3
Structure
Orthorhombic
Pbca
a = 854.9 pm, b = 824.9 pm, c = 1001.4 pm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Gold(II) sulfate is the chemical compound with the formula AuSO4 or more correctly Au2(SO4)2. This compound was previously thought to be a mixed-valent compound like AuIAuIII(SO4)2, but it was later shown that it contained the diatomic cation Au4+
2, making it one of the first known examples of an inorganic gold(II) compound. The bond distance between the gold atoms in the diatomic cation is 249 pm. [1] [2]

Production and properties

Gold(II) sulfate is produced by reaction of sulfuric acid and gold(III) hydroxide. Gold(II) sulfate is unstable in air and oxidizes to hydrogen disulfoaurate(III) (HAu(SO4)2). [1]

References

  1. 1 2 Wickleder, Mathias S. (2001). "AuSO4: A True Gold(II) Sulfate with an Au24+ Ion". Journal of Inorganic and General Chemistry. 627 (9): 2112–2114. doi:10.1002/1521-3749(200109)627:9<2112::AID-ZAAC2112>3.0.CO;2-2.
  2. ↑ Wickleder, Mathias S. (2007). Devillanova, Francesco A. (ed.). Handbook of chalcogen chemistry: new perspectives in sulfur, selenium and tellurium. Royal Society of Chemistry. pp. 359–361. ISBN   978-0-85404-366-8.
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