The five structural isomers of C\(_6\)H\(_{14}\), also known as hexane, are: 

• n-hexane: Has only primary and secondary carbon atoms
• 2-methylpentane: Has a single tertiary carbon atom
• 3-methylpentane: Has a tertiary carbon atom
• 2,2-dimethylbutane: Has two tertiary carbon atoms
• 2,3-dimethylbutane: Has two tertiary carbon atoms.