\({C_6}{H_6}\, + \,C{H_3}C{H_2}C{H_2}COCl\,\xrightarrow{{AlC{l_3}}}\) \({C_6}{H_5}COC{H_2}C{H_2}C{H_3}\,\xrightarrow{{Zn - Hg\,/\,HCl}}\) \(\mathop {{C_6}{H_5}C{H_2}C{H_2}C{H_2}C{H_3}}\limits_{Butyl\,\,benzene} \)




$\begin{array}{*{20}{c}}
{C{H_3}\,\,\,} \\
{|\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - CHC{H_3}} \\
{\,|\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,H\,\,\,\,\,\,\,Br}
\end{array}$ $\xrightarrow{{C{H_3}OH}}$