Draw All Types Of Structure Of Pentane

How many structural isomers can you draw for pentane?

Answer: There are three structural isomers of pentane:
(i) Pentane
     CH₃‒ CH₂‒ CH₂‒ CH₂‒ CH₃

(ii) 2-methyl Butane (iso-pentane)

     CH3‒CH2‒CH‒CH3
               |

               CH3

(iii)  2-2 dimethyl propane (neo-pentane)

         CH3

              |

     CH3‒ CH ‒ CH3
  

            |

          CH3