| Keto and enol isomers exist in equilibrium in which both tautomers are present but, in simple cases, the keto form is much more stable than the enol form. |
| He also investigated keto and enol tautomers and morphine alkaloids. |
| These structures are called tautomers, which exist in dynamic equilibrium with each other. |
| The nucleosides are better models for the bases in DNA and RNA because the sugar moiety eliminates tautomers that cannot occur in the polymers. |
| Most often, the ketone is the much more stable of the two tautomers. |
| However, there are also tautomers, where isomerization occurs spontaneously, such that a pure substance cannot be isolated into its tautomers. |
