Question

Identify the reagent involved in Sandmeyer reaction.

Options

• CuCN/KCN

• Cu (Powder)/HBr

• H₃PО₃

• CH₃CH₂OH

Answer 1

CuCN/KCN

Explanation:

Sandmeyer reaction replaces –N₂⁺ (diazonium group) using cuprous (Cu⁺) salt catalysts.

\[\mathrm{ArN_2^+Cl^-}\xrightarrow{\mathrm{CuCN/KCN}}\mathrm{Ar-CN+N_2\uparrow}\]