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Question
Explain the following reaction with a suitable example.
Sandmeyer reaction
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Solution
The Sandmeyer reaction involves replacing the diazonium group in an aryl diazonium salt with a nucleophile (such as Cl, Br, or CN) using cuprous salts as catalysts.
\[\ce{Ar - N^+_2X- ->[Cu2X2/HX] Ar - X + N2↑}\]
Example of Preparation of cyanobenzene from benzene diazonium chloride.
\[\ce{C6H5N^+_2Cl- ->[Cu2(CN)2/KCN] C6H5CN + N2}\]
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