The molecular formula C6H14 represents an alkane with six carbon atoms. To determine the number of constitutional isomers, we need to consider the different ways the carbon atoms can be connected.1. Hexane all six carbon atoms in a straight chain : CH3-CH2-CH2-CH2-CH2-CH32. 2-Methylpentane five carbon atoms in a straight chain, with one methyl group on the second carbon : CH3-CH CH3 -CH2-CH2-CH33. 3-Methylpentane five carbon atoms in a straight chain, with one methyl group on the third carbon : CH3-CH2-CH CH3 -CH2-CH34. 2,2-Dimethylbutane four carbon atoms in a straight chain, with two methyl groups on the second carbon : CH3-C CH3 2-CH2-CH35. 2,3-Dimethylbutane four carbon atoms in a straight chain, with one methyl group on the second carbon and one on the third carbon : CH3-CH CH3 -CH CH3 -CH3There are a total of 5 constitutional isomers that can be obtained from the molecular formula C6H14.