Question

The reaction of benzene diazonium chloride with Cu and HCl is known as:

• A. Sandmeyer reaction
• B. Etard reaction
• C. Finkelstein reaction
• D. Gattermann reaction

Hint:

The Sandmeyer reaction is widely used in aromatic halogenation, particularly for substituting diazonium groups.

Answer 1

The Correct Option is A

Step 1: Understanding Sandmeyer Reaction The Sandmeyer reaction is used to substitute diazonium groups with halogens, facilitated by CuCl or CuBr. Reaction Mechanism \[ C_6H_5N_2^+Cl^- + CuCl \longrightarrow C_6H_5Cl + N_2 \] This reaction replaces the diazonium group with chlorine, forming chlorobenzene. Conclusion Thus, the correct answer is: \[ \text{Sandmeyer reaction} \]