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| Names | |
|---|---|
| Other names
Gold monocyanide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.007.318 
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| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| CAuN | |
| Molar mass | 222.985 g·mol−1 |
| Appearance | dark yellow powder[1] |
| Density | 7.12 g·cm−3[2] |
| insoluble | |
| Structure | |
| hexagonal | |
| P6mm (No. 183) | |
a = 340 pm, c = 509 pm[2] | |
| Hazards | |
| GHS labelling:[3] | |
 
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| Danger | |
| H300, H310, H330, H410 | |
| Related compounds | |
Other cations |
Copper(I) cyanide Silver cyanide |
Related compounds |
Gold(III) cyanide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Gold(I) cyanide is the inorganic compound with the chemical formula AuCN. It is the binary cyanideofgold(I). It is an odourless, tasteless yellow solid.[4] Wet gold(I) cyanide is unstable to light and will become greenish.[4] Gold(I) cyanide itself is only of academic interest, but its derivative dicyanoaurate is an intermediate in gold cyanidation, the extraction of gold from its ores.[5]
Solid gold(I) cyanide precipitates upon reaction of potassium dicyanoaurate with hydrochloric acid:
![{\displaystyle \mathrm {K[Au(CN)_{2}]+HCl\longrightarrow AuCN+HCN+KCl} }](https://wikimedia.org/api/rest_v1/media/math/render/svg/e81b6be966b8e29d789be3d4b9831f8595943992)
It can also be produced by the reaction of gold(III) chloride and potassium cyanide.[2]
The solid dissolves to form water-soluble adducts with a variety of ligands: cyanides, hydroxide, ammonia, thiosulfate and hydrosulfide.[2]
Like most gold compounds, it converts to metallic gold upon heating.[citation needed]
Gold(I) cyanide's is a coordination polymer consisting of linear chains of AuCN such that each Au(I) center is bonded to carbon and nitrogen. The structure is hexagonal with the lattice parameters a = 3.40 Å and c = 5.09 Å.[2]T[6]
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|---|---|---|---|
| Gold(-I) |
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| Gold(I) |
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| Gold(II) |
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| Gold(I,III) |
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| Gold(III) |
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| Gold(V) |
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| Gold(VI) |
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Salts and covalent derivatives of the cyanide ion
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