Diazonium salts, reaction with substituted nitriles yields

Cyanides Yield Nitriles.—Sandmeyer also applied the principle of his reaction to the preparation of cyanide substitution products, i.e. replacement of the diazo group with cyanogen radical. The reaction is brought about by warming a diazonium salt solution with a solution of cuprous cyanide in potassium cyanide. 

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