Chemistry - STRUCTURAL ISOMERISM Question with Solution | TestHub

Acetone, cyclohexanone and propanal are simple monocarbonyl compounds; their enols are ordinary and present only in traces. Pentane-2,4-dione, CH₃-CO-CH₂-CO-CH₃, is a beta-diketone : its enol is stabilised by conjugation with the second carbonyl and by a strong intramolecular hydrogen bond, so it has by far the maximum enol content. Hence (C).