There are five structural isomers for the alkane C6H14. Here are their IUPAC names and structures:1. n-Hexane Structure: CH3-CH2-CH2-CH2-CH2-CH32. 2-Methylpentane Structure: CH3-CH CH3 -CH2-CH2-CH33. 3-Methylpentane Structure: CH3-CH2-CH CH3 -CH2-CH34. 2,2-Dimethylbutane Structure: CH3-C CH3 2-CH2-CH35. 2,3-Dimethylbutane Structure: CH3-CH CH3 -CH CH3 -CH3Note that the structures are represented in a linear format, but in reality, they have a three-dimensional arrangement.