Question

Draw the chain isomers of hexane (${{C}_{6}}{{H}_{14}}$ ).

Answer 1

The isomers which have the same molecular formula and difference in their arrangement of carbon atoms in a chain are called chain isomers. Chain isomerism is possible in case of the compounds having more than two carbon atoms.

Complete Solution :
- In the question it is given that to draw the chain isomers of hexane.
- The molecular formula of hexane is ${{C}_{6}}{{H}_{14}}$ .
- Means there are six carbons and 14 hydrogens in hexane molecular formula.
- The possible structures of the chain isomers for hexane with the molecular formula ${{C}_{6}}{{H}_{14}}$ are as follows.

- From the above structures we can say that there are five isomers possible for hexane.
- The five isomers possible for hexane are n- hexane, 2- methyl pentane, 3- methyl pentane, 2, 3-dimethylbutane and 2, 2- dimethylbutane.
- 2- methyl pentane is also called Isohexane.
- 2, 2- dimethyl butane also called Neohexane.
- These five isomers are called constitutional isomers because each structure contains the same number of carbon atoms and the same number of hydrogen atoms.
- The above five structures have the same molecular formula but different in the arrangement of carbon atoms in the main chain.

Note: The number of possible arrangements of carbon atoms in the main chain produces the isomers of the compound. The chain isomers will have the same molecular formula but have differences in the arrangement of the carbon atoms with respect to chain.