Which of the following is a possible enol form of 2-butanone?

Question

Quizplus · Accepted Answer

Both II and III are possible enol forms of 2-butanone. In II, the enol is formed by removing a proton from the alpha-carbon and transferring the resulting double bond to the adjacent carbonyl carbon. In III, the enol is formed by removing a proton from the alpha-carbon and transferring the resulting double bond to the beta-carbon. Both of these forms are stable due to the presence of resonance structures.

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