Which of the following compounds have isolated double bonds?
A) II and IV
B) III and V
C) I, III, and V
D) I and V
E) I and III

Question

Which of the following compounds have isolated double bonds? 
A) II and IV 
B) III and V 
C) I, III, and V 
D) I and V 
E) I and III

Quizplus · Accepted Answer

The compound II has an isolated double bond between the two carbon atoms in the cyclohexene ring. The compound IV, although it has multiple double bonds, each double bond is present between adjacent carbon atoms and not isolated, hence, it does not have an isolated double bond. Hence, the compounds I, III, and V have conjugated double bonds and do not have isolated double bonds. Therefore, the correct answer is A) II and IV.

Which of the Following Compounds Have Isolated Double Bonds