Question
Identify total number of structural isomers with $C_5H_{12}$ molecular formula ?

Answer

$\mathop {C{H_3}C{H_2}C{H_2}C{H_2}C{H_3}}\limits_{n\, - \,pentane} $       $\mathop {\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3}CHC{H_2}C{H_3}} 
\end{array}}\limits_{isopentane} $      $\mathop {\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {\,\,\,\,C{H_3}} \\ 
  | 
\end{array}} \\ 
  {{H_3}CCC{H_3}} \\ 
  | \\ 
  {\,\,\,\,\,\,\,C{H_3}} 
\end{array}}\limits_{neopentane} $

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