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ChemicalBook CAS DataBase List COBALT CYANIDE
542-84-7

COBALT CYANIDE synthesis

1synthesis methods
The trihydrate salt is obtained as a reddish brown precipitate by adding potasium cyanide to a cobalt salt solution:
CoCl2 + KCN + 3H2O → Co(CN)2?3H2O + 2KCl
This on dehydration yields anhydrous Co(CN)2. The Co(CN)2?3H2O precipitate formed above redissolves when excess KCN is added, forming a red solution of potassium cobalt(II) cyanide, K4Co(CN)6. Stoichiomtric amount of KCN should, therefore, be used in the preparation of cobalt(II) cyanide.
-

Yield:-

Reaction Conditions:

with water;cobalt(II) chloride

References:

Bigelow [Inorganic Syntheses,1946,vol. 2,p. 226]

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