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Draw the structures for the following compounds
$(i)$ Ethanoic acid $(ii)$ Bromopentane $^*$
$^*$ Are structural isomers possible for bromopentane ?
Solution
$(i)$ $CH _{3} COOH$ $\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{H\,\,\,\,\,\,\,O\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,||\,\,}
\end{array}} \\
{H – C – C – OH} \\
{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{H\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$
$(ii)$ There are many structural isomers possible for bromopentane. Among them, the structures of three isomers are given.
$CH _{3} CH _{2} CH _{2} CH _{2} CH _{2} Br$ $\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,\,H} \\
{|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{H – C – C – C – C – C – Br} \\
{\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,} \\
{H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,H\,}
\end{array}$
$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,\,H} \\
{|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{H – C – C – C – C – C – H} \\
{\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,} \\
{\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,Br\,\,\,\,\,\,H\,}
\end{array}$
$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,H\,\,\,\,\,\,\,H} \\
{|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|}
\end{array}} \\
{H – C – C – C – C – C – H} \\
{\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,|\,\,\,} \\
{\,H\,\,\,\,\,\,\,H\,\,\,\,\,\,\,Br\,\,\,\,\,H\,\,\,\,\,\,H\,}
\end{array}$
