that they can be characterized. Delocalization can stabilize the enol tautomer. Thus, very stable enols are phenols. Another stabilizing factor in 1,3-dicarbonyls is intramolecular hydrogen bonding. Both of these factors influence the enol-dione equilibrium in acetylacetone. See also Alkenal Enolase Ketone Ynol Geminal diol, another form of ketones and aldehydes in water solutions Regioselectivity References External links Enols and enolates in biological reactions Biosynthesis Functional groups Metabolism Reactive intermediates Alcohols Alkene derivatives Organic reactions