Question

Fluorobenzene (C6H5F) can be synthesized in the laboratory

• A. From aniline by diazotisation followed by heating the diazonium salt with HBF4
• B. By direct fluorination of benzene with F2 gas
• C. By reacting bromobenzene with NaF solution
• D. By heating phenol with HF and KF

Answer 1

Answer: (A)

From aniline by diazotisation followed by heating the diazonium salt with HBF4

Answer 2

$\xrightarrow [ \mathrm { O } - 5 ^ { \circ } \mathrm { C } ] { \mathrm { NaNO } _ { 2 } + \text { dilHCI } }$ $\xrightarrow { \mathrm { HBF } _ { 4 } }$ $\xrightarrow { \Delta }$