Which compound is not a constitutional isomer of the others?
A)I
B)II
C)III
D)IV
E)All of these choices are isomers of each other.

Name: Which compound is not a constitutional isomer of the others? A)I B)II C)III D)IV E)All of these choices are isomers of each other.
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Question

Which compound is not a constitutional isomer of the others? 
A)I 
B)II 
C)III 
D)IV 
E)All of these choices are isomers of each other.

Quizplus · Accepted Answer

Compound IV has a cyclohexene ring and an alkene, while the other three compounds have only one of these functional groups. Therefore, compound IV cannot be a constitutional isomer of the other three compounds.

Which Compound Is Not a Constitutional Isomer of the Others