Question

Identify the correct sequence of reagents to carry out the conversion: \[ \mathrm{Aniline} \longrightarrow \mathrm{Fluorobenzene} \]

• A. (i) $\mathrm{NaNO_2 + HCl,\ 273-278\,K}$; (ii) $\mathrm{HBF_4}$, heat
• B. (i) $\mathrm{Cl_2/FeCl_3}$; (ii) $\mathrm{NaF}$
• C. (i) $\mathrm{HNO_3 + H_2SO_4}$; (ii) $\mathrm{HF}$
• D. (i) $\mathrm{NaNO_2 + HCl}$; (ii) $\mathrm{Cu_2F_2}$

Hint:

Remember: \[ \mathrm{Aniline} \rightarrow \mathrm{Diazonium\ Salt} \rightarrow \mathrm{Fluorobenzene} \] The conversion is achieved by the Balz-Schiemann reaction using $\mathrm{HBF_4}$ followed by heating.

Answer 1

The Correct Option is A