enolate: meaning, definition, pronunciation and examples
RareTechnical/Scientific
Quick answer
What does “enolate” mean?
A resonance-stabilized anion derived from a carbonyl compound (typically an aldehyde or ketone) by the removal of a proton from the alpha carbon.
Audio
Pronunciation
Definition
Meaning and Definition
A resonance-stabilized anion derived from a carbonyl compound (typically an aldehyde or ketone) by the removal of a proton from the alpha carbon.
The term is primarily used in organic chemistry to describe the reactive intermediate in enolate chemistry, central to reactions like aldol additions, alkylations, and Claisen condensations. It represents a nucleophilic species where the negative charge is delocalized between the alpha carbon and the carbonyl oxygen.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or pronunciation differences exist. The technical concept and term are identical in both dialects.
Connotations
Purely technical, with no cultural or dialectal connotations.
Frequency
Frequency is identically very low outside of chemistry textbooks and research papers in both regions.
Grammar
How to Use “enolate” in a Sentence
The [ketone/aldehyde] forms a stable [lithium] enolate.The reaction proceeds through an enolate [intermediate].The [base] deprotonates the substrate to generate the enolate.Vocabulary
Collocations
Examples
Examples of “enolate” in a Sentence
adjective
British English
- The enolate chemistry was central to the synthesis.
- The kinetic enolate product was favoured.
American English
- Enolate reactivity is a key topic.
- The silyl enolate ether was isolated.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Common in advanced undergraduate and graduate-level chemistry courses, textbooks, and research publications.
Everyday
Never used in everyday conversation.
Technical
Core term in synthetic organic chemistry, medicinal chemistry, and related laboratory research fields.
Vocabulary
Synonyms of “enolate”
Neutral
Weak
Watch out
Common Mistakes When Using “enolate”
- Using 'enolate' as a verb (e.g., 'to enolate the ketone'). The correct phrasing is 'to form/generate the enolate of the ketone'.
- Confusing 'enolate' with 'enol', which is the neutral protonated form.
FAQ
Frequently Asked Questions
No, it is a highly specialized technical term used almost exclusively in organic chemistry.
No, it is a noun. The process is described as 'forming an enolate' or 'generating an enolate'.
An enol is a neutral molecule containing a hydroxyl group adjacent to a carbon-carbon double bond (C=C-OH). An enolate is the corresponding anion formed by deprotonation of that hydroxyl group or the alpha-carbon of a carbonyl, with the negative charge delocalized between oxygen and carbon.
Enolates are pivotal intermediates in synthetic organic chemistry, enabling the formation of new carbon-carbon bonds in reactions like aldol additions, Claisen condensations, and alkylations, which are foundational for constructing complex molecules, including pharmaceuticals.
A resonance-stabilized anion derived from a carbonyl compound (typically an aldehyde or ketone) by the removal of a proton from the alpha carbon.
Enolate is usually technical/scientific in register.
Enolate: in British English it is pronounced /ˈiːnəleɪt/, and in American English it is pronounced /ˈiːnəleɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'ENOL' (the alkene-alcohol functional group) + 'ATE' (as in the ending for salts/ions, like nitrate). An enOLATE is the ionic, deprotonated form of an enol.
Conceptual Metaphor
An enolate acts as a 'chemical negotiator' with two reactive sites (carbon and oxygen), allowing it to participate in complex bond-forming reactions.
Practice
Quiz
What is the primary characteristic of an enolate?