Question

Which of the following sets of reagents convert aniline to chlorobenzene?

• A. NaNO\(_2\) / HCl, 273 – 278 K; Cu\(_2\)Cl\(_2\) / HCl
• B. NaNO\(_2\) / HCl, 293 – 298 K; Cu\(_2\)Cl\(_2\) / HCl
• C. NaNO\(_2\) / HCl, 273 – 278 K; SOCl\(_2\)
• D. NaNO\(_2\) / HCl, 273 – 278 K; Cl\(_2\)

Hint:

Sandmeyer reaction converts diazonium salts to aryl halides using copper(I) salts.

Answer 1

The Correct Option is A

Aniline is diazotized using NaNO\(_2\) and HCl at low temperatures (273–278 K) to form a diazonium salt, which then reacts with Cu\(_2\)Cl\(_2\) (Sandmeyer reaction) to form chlorobenzene.