.png) | |
| Names | |
|---|---|
| Other names Gold monocyanide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.007.318 |
| EC Number |
|
| |
| |
| 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] | |
  | |
| Danger | |
| H300,H310,H330,H410 | |
| Related compounds | |
Othercations | Copper(I) cyanide Silver cyanide |
Related compounds | Gold(III) cyanide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Gold(I) cyanide is theinorganic compound with the chemical formula AuCN. It is the binarycyanide ofgold(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 derivativedicyanoaurate is an intermediate ingold cyanidation, the extraction of gold from its ores.[5]
Solid gold(I) cyanide precipitates upon reaction ofpotassium dicyanoaurate withhydrochloric acid:
It can also be produced by the reaction ofgold(III) chloride andpotassium cyanide.[2]
The solid dissolves to form water-soluble adducts with a variety of ligands: cyanides,hydroxide,ammonia,thiosulfate andhydrosulfide.[2]
Like most gold compounds, it converts to metallic gold upon heating.[citation needed]
Gold(I) cyanide's is acoordination 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][6]
