Gold(I) chloride

Gold(I) chloride is a compound of gold and chlorine with the chemical formula AuCl.

Gold(I) chloride
Names
Other names
Gold(I) chloride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.030.583
UNII
Properties
AuCl
Molar mass 232.423 g/mol
Appearance yellow solid
Density 7.6 g/cm3 [1]
Melting point 170 °C (338 °F; 443 K)
Boiling point 298 °C (568 °F; 571 K) (decomposes)
very slightly soluble
Solubility soluble in HCl, HBr organic solvents
67.0·10−6 cm3/mol
Structure
Tetragonal, tI16
I41/amd, No. 141
Hazards
Safety data sheet MSDS
NFPA 704 (fire diamond)
0
2
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Preparation

Gold(I) chloride is prepared by thermal decomposition of gold(III) chloride.

Reactions

Although there is a region of stability at higher temperatures at the appropriate chlorine vapor pressures, the compound is metastable at ambient conditions. When heated with water, the compound disporpotionates to metallic gold and gold(III) chloride in an autoredox reaction:

3 AuCl → 2 Au + AuCl3

Reaction with potassium bromide yields potassium auric bromide and potassium chloride with separation of metallic gold:

3 AuCl + 4 KBr → KAuBr4 + 2 Au + 3 KCl

Safety

Gold(I) chloride may irritate the skin and eyes, damage kidney function, and reduce white blood cell counts.

References

  1. Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
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