carbonyl group: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “carbonyl group” mean?
A functional group in organic chemistry consisting of a carbon atom double-bonded to an oxygen atom (C=O).
Audio
Pronunciation
Definition
Meaning and Definition
A functional group in organic chemistry consisting of a carbon atom double-bonded to an oxygen atom (C=O).
A structural unit present in numerous organic compounds such as ketones, aldehydes, carboxylic acids, esters, and amides, which significantly influences the chemical and physical properties of these molecules.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling conventions for related compounds (e.g., 'sulphur' vs 'sulfur' in British vs. American English) do not affect this term.
Connotations
None beyond its precise scientific definition.
Frequency
Equally common and essential in both British and American scientific discourse.
Grammar
How to Use “carbonyl group” in a Sentence
The carbonyl group [reacts/is attacked/undergoes reduction].Vocabulary
Collocations
Examples
Examples of “carbonyl group” in a Sentence
adjective
British English
- The carbonyl stretching frequency is diagnostic.
American English
- The carbonyl absorption band is strong.
Usage
Meaning in Context
Business
Extremely rare outside of businesses directly related to chemical production or analysis.
Academic
Core vocabulary in university-level organic chemistry courses and related research publications.
Everyday
Virtually never used.
Technical
Fundamental and extremely high-frequency term in all fields of chemistry involving organic molecules.
Vocabulary
Synonyms of “carbonyl group”
Neutral
Weak
Watch out
Common Mistakes When Using “carbonyl group”
- Pronouncing it as 'car-BON-yl' (stress on second syllable). The correct stress is on the first syllable: 'CAR-bon-yl'.
- Using it as a countable noun without specifying the compound (e.g., 'A carbonyl was added' – incorrect; 'A carbonyl group was formed' – correct).
FAQ
Frequently Asked Questions
No. A ketone is one type of compound that *contains* a carbonyl group where the carbon is bonded to two other carbon atoms. The carbonyl group (C=O) is the functional group present within ketones, aldehydes, and others.
Its polarity and reactivity make it a key site for countless chemical reactions, forming the basis for synthesizing a vast array of pharmaceuticals, polymers, and biological molecules.
Not directly, but its presence is easily detected using infrared (IR) spectroscopy, which shows a strong, characteristic absorption band around 1700 cm^-1.
No. Carbon monoxide is a standalone, toxic gas molecule. A carbonyl group is specifically a functional group *within* a larger organic molecule.
A functional group in organic chemistry consisting of a carbon atom double-bonded to an oxygen atom (C=O).
Carbonyl group is usually technical/scientific in register.
Carbonyl group: in British English it is pronounced /ˈkɑːbənɪl ɡruːp/, and in American English it is pronounced /ˈkɑːrbənɪl ɡruːp/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'car' (C for carbon), 'bon' (sounds like 'bone', the core structure), and 'yl' (a common suffix for groups). The group is the 'bone' of many organic molecules.
Conceptual Metaphor
The carbonyl group acts as an electrophilic site—a 'hungry' positive centre that attracts electron-rich 'attackers' like nucleophiles.
Practice
Quiz
Which of the following is a compound containing a carbonyl group?