Gold(I) chloride

Gold(I) chloride
Other names Gold(I) chloride
Identifiers
CAS number	10294-29-8 Y
PubChem	27366
ChemSpider	25464 Y
ChEBI	CHEBI:30078 Y
Jmol-3D images	Image 1
SMILES [Au]Cl
InChI InChI=1S/Au.ClH/h;1H/q+1;/p-1 Y Key: FDWREHZXQUYJFJ-UHFFFAOYSA-M Y InChI=1/Au.ClH/h;1H/q+1;/p-1 Key: FDWREHZXQUYJFJ-REWHXWOFAM
Properties
Molecular formula	AuCl
Molar mass	232.423 g/mol
Appearance	yellow solid
Density	7.6 g/cm3
Melting point	170 °C
Boiling point	298 °C (decomposes)
Solubility in water	very slightly soluble
Solubility	soluble in HCl, HBr organic solvents
Structure
Crystal structure	Tetragonal, tI16
Space group	I41/amd, No. 141
Hazards
MSDS	MSDS
NFPA 704	0 2 0
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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

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.