Question

When benzene diazonium chloride is treated with cuprous chloride in $HCl$, chlorobenzene is formed. This reaction is called:

• A. Perkin reaction
• B. Hinsberg reaction
• C. Gattermann reaction
• D. Sandmeyer reaction

Answer 1

Answer: (D)

Sandmeyer reaction

When benzene diazonium chloride is treated with cuprous chloride in $HCl$, chlorobenzene is formed.

This reaction is called Sandmeyer reaction. In this reaction, the diazonium group is replaced by chloro group.

Sandmeyer reaction is used to replace the diazonium group with chlorine, bromine or cyano group.

Option D is correct.