Cobalt(II) cyanide

Cobalt(II) cyanide
Names
	IUPAC name Cobalt(II) cyanide
	Other names cobaltous cyanide
Identifiers
CAS Number	542-84-7 ; 20427-11-6 (dihydrate) ; 26292-31-9 (trihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	61631 ;
ECHA InfoCard	100.008.028
PubChem CID	68336;
UNII	3300OC3VVZ ;
CompTox Dashboard (EPA)	DTXSID20969165 ;
	InChI InChI=1S/2CN.Co/c21-2;/q2-1;+2 Key: CWZOMTYLSNXUEL-UHFFFAOYSA-N ; InChI=1/2CN.Co/c21-2;/q2-1;+2 Key: CWZOMTYLSNXUEL-UHFFFAOYAR;
	SMILES [Co+2].[C-]#N.[C-]#N;
Properties
Chemical formula	Co(CN)2
Molar mass	110.968 g/mol
Appearance	deep-blue powder ; hygroscopic
Density	1.872 g/cm3 (anhydrous)
Melting point	220 °C (428 °F; 493 K) (decomposes)
Solubility in water	insoluble
Solubility	dihydrate ; degraded with dissolution by NaCN, KCN, NH4OH, HCl
Magnetic susceptibility (χ)	+3825·10−6 cm3/mol
Related compounds
Other anions	Cadmium chloride,; Cadmium iodide
Other cations	Zinc cyanide,; Calcium cyanide,; Magnesium cyanide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cobalt(II) cyanide is the inorganic compound with the empirical formula Co(CN)₂ and structural formula Co₃[Co(CN)₅]₂. It is a coordination polymer that has attracted intermittent attention over many years in the areas of inorganic synthesis and homogeneous catalysis. The anhydrous and octahydrate forms are both blue solids insoluble in water.