Definition

1. Noun:
   • An organic compound containing a hydroxyl group bonded to a carbon atom which is doubly bonded to another carbon atom: An enol is a specific type of molecule in organic chemistry characterized by a carbon-carbon double bond (C=C) where one of the carbon atoms is also bonded to a hydroxyl (-OH) group. This structure makes it a reactive intermediate in many chemical reactions.

Examples of Usage

• Noun:
  • The keto-enol tautomerism is a fundamental concept in organic chemistry. (This describes the equilibrium between a ketone and its enol form.)
  • The molecule exists primarily as the enol due to stabilization by intramolecular hydrogen bonding. (This shows the enol form can be the dominant structure.)
  • Chemists studied the properties of the enol intermediate in the reaction mechanism. (This uses "enol" to describe a reactive species formed during a reaction.)

Advanced Usage

• "Enolization": The chemical process of converting a carbonyl compound (like a ketone or aldehyde) into its corresponding enol form.
  • The rate of enolization is influenced by the solvent and the presence of catalysts.
• "Enolate ion": The conjugate base of an enol, formed by the removal of a proton from the hydroxyl group. This is a key nucleophile in many reactions.
  • The enolate ion attacked the electrophile to form a new carbon-carbon bond.

Variants and Related Words

• Enolic (adj): Pertaining to or characteristic of an enol.
  • The compound exhibits enolic properties.
• Keto-enol tautomerism (n): A chemical equilibrium between a keto form (a ketone or aldehyde) and an enol form of a compound.
  • Understanding keto-enol tautomerism is crucial for predicting reaction products.

Synonyms

• Alkenol: A more systematic name that explicitly indicates the presence of both an alkene (C=C) and an alcohol (-OH) group. (Note: "enol" is the more common and concise term.)

Related Phrases and Concepts

• Enol ether: A derivative of an enol where the hydrogen of the hydroxyl group is replaced by an alkyl group (e.g., -OCH₃).
  • Enol ethers are useful synthetic intermediates.
• Enolization catalyst: A substance, often an acid or base, that accelerates the formation of an enol.
  • The reaction required a strong base as an enolization catalyst.

Noun

1. an organic compound that contains a hydroxyl group bonded to a carbon atom which in turn is doubly bonded to another carbon atom