3-membered
Definition
- Adjective:
- Having a ring structure consisting of three atoms: Used specifically in chemistry to describe a cyclic compound whose ring is formed by exactly three atoms.
Usage
- This adjective is a technical term used almost exclusively in chemistry. It modifies nouns referring to chemical compounds or ring systems.
- It is typically used attributively (before the noun it modifies) and is often hyphenated.
Examples
- Adjective:
- Cyclopropane is a classic example of a 3-membered ring compound.
- The strain in 3-membered rings, like epoxides, makes them highly reactive.
Advanced Usage
- The term is part of a systematic naming convention for ring sizes in organic chemistry (e.g., 3-membered, 4-membered, 5-membered).
- It can be used to describe the ring within a more complex molecule.
- The molecule features a fused system containing a 3-membered ring.
Variants and Related Words
- Three-membered: A less common, non-hyphenated variant with the same meaning.
- Triatomic ring: A more descriptive synonym focusing on the three-atom composition.
- Small ring: A broader category that includes 3-membered and 4-membered rings due to their high angle strain.
Synonyms
- Triatomic (when referring specifically to the ring)
- Three-atom ring
Antonyms
- Macrocyclic (referring to large rings, typically with 12 or more members)
- Acyclic (not cyclic; having an open-chain structure)
Related Chemical Terms
- Cyclopropane: The simplest organic 3-membered ring compound.
- Epoxide / Oxirane: A 3-membered ring containing one oxygen atom.
- Aziridine: A 3-membered ring containing one nitrogen atom.
- Thiirane: A 3-membered ring containing one sulfur atom.
Adjective
-
of a chemical compound having a ring with three members
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