## Organic Chemistry (8th Edition)

They are constitutional isomers. Count the number of Carbons and the hydrogens. In the given compounds, the molecular formula of both the compounds is $C_7H_{12}$. However, the connectivity of the $CH_3$ is different. On the left one the $CH_3$ is connected to the carbon with double bond and on the right one the $CH_3$ is not connected to the carbon with double bond.