It is \(\alpha \) - subtitution when a carboxylic acid having \(\alpha \) - hydrogens is treated with chlorine or bromine in presence of small amount of red phosphorous.
\(R-C{{H}_{2}}COOH\,+\,{{X}_{2}}\,\xrightarrow{P}\) \(\begin{matrix}
X\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
RCH-COOH+HX \\
\end{matrix}\) \((X\,=\,Cl,\,Br)\)
ઉપરોક્ત પ્રકિયા ની નીપજ શોધો

${CH}_{3} {COOH}+{SOCl}_{2} \longrightarrow {A} \xrightarrow[AlCl_3]{Benzene} {B} \xrightarrow[-OH]{KCN} {C}$
