enol

/ˈiːnɒl/
noun
  1. A type of chemical compound that has a carbon-carbon double bond and a hydroxyl group (OH) attached to one of the carbon atoms.
    • In organic chemistry class, we learned how an enol can convert into a ketone through a process called tautomerization.
    • Many biochemical reactions involve the formation of an enol intermediate.
    • The enol form of the molecule is less stable than its keto counterpart.
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