Final answer:
There are six possible structural non-cyclical isomers of C₆H₁₂.
Step-by-step explanation:
Isomers are compounds that have the same molecular formula but different structural formulas. To determine the number of structural non-cyclical isomers with the formula C₆H₁₂, we need to determine the different ways the carbon atoms can be arranged within the molecule.
In the case of C₆H₁₂, there are several possible arrangements:
N-Heptane: A straight-chain alkane with six carbon atoms and two hydrogen atoms bonded to each carbon; sometimes referred to as n-C₆H₁₄ or H₃C(CH₂)₅CH₃.
2-Methylhexane: A branched alkane with a methyl group (CH₃) attached to the second carbon atom.
3-Methylhexane: A branched alkane with a methyl group (CH₃) attached to the third carbon atom.
2,2-Dimethylpentane: A branched alkane with two methyl groups (CH₃) attached to the second carbon atom.
2,3-Dimethylpentane: A branched alkane with a methyl group (CH₃) attached to the second and third carbon atoms.
2,3-Dimethylpentane: A branched alkane with a methyl group (CH₃) attached to the third and fourth carbon atoms.
These are the six possible structural non-cyclical isomers for C₆H₁₂.