aldehyde radical
Definition
Noun: - The chemical group -CHO: A functional group in organic chemistry consisting of a carbonyl group (a carbon atom double-bonded to an oxygen atom) bonded to a hydrogen atom and to an R group (which can be a hydrogen or a hydrocarbon chain). It is the defining group of aldehydes.
Usage Notes
- The term "aldehyde radical" is a specific, technical term used almost exclusively in the field of chemistry. It refers to the molecular structure itself, not to a free radical in the reactive sense. In modern chemical nomenclature, the term "aldehyde group" or "formyl group" is more commonly used.
Examples of Usage
- Noun:
- The presence of an aldehyde radical in the compound was confirmed by spectroscopic analysis.
- Formaldehyde is the simplest molecule containing the aldehyde radical, where the R group is a hydrogen atom.
- The reagent specifically targets the aldehyde radical, converting it to a carboxylic acid.
Advanced Usage
- In chemical reactions: The aldehyde radical is highly reactive and is a key site for nucleophilic addition reactions, such as oxidation, reduction, and condensation.
- The Grignard reagent attacks the carbon of the aldehyde radical.
Variants and Related Words
- Aldehyde group (n): A more common synonym for "aldehyde radical."
- Formyl group (n): The specific name for the -CHO group when R is H; also used more generally.
- Carbonyl group (n): The C=O group, which is a component of the aldehyde radical, as well as ketones and carboxylic acids.
Synonyms
- Aldehyde group: The standard term for the -CHO functional group.
- Formyl group: Often used interchangeably, especially in systematic naming.
Related Phrases / Terms
- Aldehyde: The class of organic compounds that contain the aldehyde radical.
- Benzaldehyde is an aldehyde with a benzene ring attached to the aldehyde group.
Noun
-
the chemical group -CHO
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