What is the total number of distinct structural isomers possible for the saturated alkane hexane ()? — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

The molecular formula $C_6H_{14}$ has $DU=0$. Systematically drawing the possible carbon skeletons yields exactly 5 structural isomers: n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane.