\(\,\begin{array}{*{20}{c}}
{C{H_3}C{H_2}} \\
{C{H_3}C{H_2}}
\end{array} > C < \begin{array}{*{20}{c}}
{OMgBr} \\
{C{H_2}C{H_3}}
\end{array}\xrightarrow{{{H_2}O/{H^ + }}}\)
\(\begin{array}{*{20}{c}}
{\,\,\,\,OH} \\
| \\
{C{H_3}C{H_2} - C - C{H_2}C{H_3}} \\
| \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}C{H_3}}
\end{array}\, + \,Mg(OH)Br\)
${image}$