Which of the following is a possible enol form of 2-butanone?
A)I
B)II
C)III
D)II and III

Question

Which of the following is a possible enol form of 2-butanone? 
A)I 
B)II 
C)III 
D)II and III

Quizplus · Accepted Answer

II and III are possible enol forms of 2-butanone. In II, the hydrogen from the alpha carbon is removed, creating a double bond between the alpha and beta carbons, and the oxygen from the carbonyl group becomes a hydroxyl group. In III, the same changes occur, but the double bond is between the beta and gamma carbons. Both of these structures are correct enol forms of 2-butanone.

Which of the Following Is a Possible Enol Form of 2-Butanone