Gold(II) sulfate

Gold(II) sulfate
	; Structure of gold(II) sulfate(Red spheres: Au; Yellow spheres: S; Blue spheres: O)
Names
	Other names Gold sulfate; Digold disulfate;
Identifiers
CAS Number	371777-29-6 ;
3D model (JSmol)	Interactive image;
	SMILES [O-]S(=O)(=O)[O-].[Au+2][Au+2].[O-]S(=O)(=O)[O-];
Properties
Chemical formula	Au2(SO4)2
Molar mass	293.03 g/mol
Appearance	Red crystals
Density	5.51 g/cm3
Structure
Crystal structure	Orthorhombic
Space group	Pbca
Lattice constant	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). Infobox references

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 as Au^IAu^III(SO₄)₂. But later, it was shown that it contained the diatomic cation, Au⁴⁺
₂ which made it the first simple 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

^ ^a ^b 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.
^ 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.

[:)-1] 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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