Beta-Dicarbonyl Compounds
There are two reason why the enols of beta-dicarbonyl compounds, such as pentane-2,4-dione are relatively stable. One is that they are conjugated and the pi-electron overlap due to the conjugation provides additional stability. What is the other reason that these species are relatively stable. Would you expect the enol of cyclohexane-1,3-dione to be as stable as the enol of pentane-2,4-dione?