J Puur ways that carbon skeletons can vary. nt (a) Length Ethane Propane Carbon

Question

J Puur ways that carbon skeletons can vary. nt (a) Length Ethane Propane Carbon skeletons vary in length (b) Branching Butane 2-Methylpropane (commonly called isobutane) Skeletons may be unbranched or branched. (c) Double bond position -H 1-Butene 2-Butene The skeleton may have double bonds, which can vary in location. (d) Presence of rings Benzene Cyclohexane Some carbon skeletons are arranged in rings. In the abbreviated structural formula for each compound (to its right), each corner represents a carbon and its attached hydrogens

Explanation / Answer

Pairs b and c are isomers. Because they have same molecular formulas.

(A) length

Ethane and propane are not isomers. Molecular formula must be same to be isomers.

(B) branching

Butane and isobutane are chain isomers.(structural isomers)

(C) double bond position

But-1-ene and but-2-ene are structural isomers

(D) presence of rings

Cyclohexane and benzene arent isomers.

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