How many structural isomers are possible for the alkane C₆H₁₄?
Correct answer D. 5
Explanation
The isomers are hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane and 2,3-dimethylbutane, giving 5 in total. They differ only in the branching of the carbon chain, so they are chain isomers.
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