\(C H_{3} B r+A g F \rightarrow \underset{\text { Methyl fluoride}}{C H_3F}+A g B r\)
But, when aciton of Nallacetone takes place on alkyl chloride of bromide alkyl lodide forms. This reaction is called Finkelstein reaction
\(C_{2} H_{2} C I \stackrel{N a t}{\longrightarrow} C_{2} H_{5} I+N a C I\)
Free redical fluorination is highly explosive reaction, so not preferred for the preparation of fluoride.
$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{Z}^{-}$$\xrightarrow[{{\text{Sublimation}}}]{{{k_s}}} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Z}+\mathrm{Br}^{-}$
$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{Z}^{-}$$\xrightarrow[{{\text{elimination}}}]{{{k_e}}}\mathrm{CH}_{3} \mathrm{CH}= \mathrm{CH}_{2} +\mathrm{HZ}+\mathrm{Br}^{-}$
where
$\mathrm{Z}^{-}=\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{O}^{-}(\mathrm{A})$ or $\begin{array}{*{20}{c}}
{\,C{H_3}} \\
{|\,\,\,\,\,} \\
{C{H_3} - C - {O^ - }(B)} \\
{|\,\,\,\,} \\
{\,\,C{H_3}}
\end{array}$
જો $\mathrm{k}_{\mathrm{s}}$ અને $\mathrm{k}_{\mathrm{e}}$ અનુક્રમે વિસ્થાપન અને વિલોપન માટેના વેગ અચળાંક હોય અને $\mu=\frac{\mathrm{k}_{\mathrm{s}}}{\mathrm{k}_{\mathrm{e}}}$ હોય, તો સાચો વિકલ્પ જણાવો.
$\,\text{C}{{\text{H}}_{\text{3}}}\text{Br }\xrightarrow{\text{KCN}}A\xrightarrow{{{H}_{3}}O}B\xrightarrow{LiAl{{H}_{4}}}C$