Question

Flourobenzene $\left(C_6{H}_{5}F\right)$ can be synthesised in the laboratory :

• A. by heating phenol with $HF$ and $KF$
• B. from aniline by diazotisation followed by heating the diazonium salt with $HB{F}_4$
• C. by direct fluorination of benzene with $F_2$ gas
• D. by reacting $PhBr$ with $NaF$ solution

Answer 1

Answer: (B)

from aniline by diazotisation followed by heating the diazonium salt with $HB{F}_4$

Fluorobenzene $\left(C_6{H}_{5}F\right)$ can be synthesized in the laboratory from aniline by diazotisation followed by heating the diazonium salt with $HB{F}_4$. The reaction is called Balz-Schiemann reaction.