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How to solve this kind of problems. What determines their stability?

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  • $\begingroup$ Welcome! Homework questions must display some effort. Please include your attempt/thoughts on the problem, to avoid the deletion of this question. $\endgroup$ Commented Apr 4, 2019 at 6:14
  • $\begingroup$ When a ketone undergoes tautomerism to form an enol, where is the new double bond? $\endgroup$
    – Karsten
    Commented Apr 4, 2019 at 19:10

1 Answer 1

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This is a strange question - isn't it possible to form an aromatic enol in all 4 cases? #3 is the least obvious, but will still proceed:

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Maybe I'm misunderstanding the question, vote me down if so!

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