Formula Co(CN)2 Density 1.87 g/cm³ | Molar mass 110.968 g/mol Melting point 280 °C | |
Appearance deep-blue powder; hygroscopic (anhydrous); reddish-brown powder (dihydrate) | ||
Cobalt(II) cyanide is the inorganic compound with the formula Co(CN)2. It is coordination polymer that has attracted intermittent attention over many years in the area of inorganic synthesis and homogeneous catalysis.
Contents
Uses
Cobalt(II) cyanide has been used as a precursor to cobalt carbonyl.
Preparation
The trihydrate salt is obtained as a reddish-brown precipitate by adding potassium cyanide to a cobalt salt solution.:
CoCl2(H2O)6 + 2 KCN → Co(CN)2 + 2 KCl + 6 H2OHydrated Co(CN)2 dissolves in the presence of excess potassium cyanide, forming a red solution of K4Co(CN)6. This material further oxidizes to yellow K3Co(CN)6.
References
Cobalt(II) cyanide Wikipedia(Text) CC BY-SA