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

The other three compounds have the same molecular formula (C4H9I) but differ in their structural arrangement. Compound A (CH3I) has a different molecular formula and is therefore not a constitutional isomer of the other three.

Which Compound Is Not a Constitutional Isomer of the Others