C6H14 is hexane. It has 5 structural isomers like n-hexane, 2-methyl pentane, 3-methyl pentane, 2,2-dimethyl butane, 2,3-dimethyl butane.
Important Point
Compounds with different physical properties were found to have the same elemental composition and molecular weight. Such compounds were called isomers.
The below table shows the number of constitutional isomers for each of the acyclic alkanes CnH2n+2, where n=1-10.
If the number of carbon atoms increases, the number of possible constitutional isomers increases rapidly.