3-membered

Thân thiện

A chemist draws the structure of a 3-membered ring compound on a whiteboard.

Definition

1. 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.

Học thuật

Adjective

1. of a chemical compound having a ring with three members

Từ đồng nghĩa

• three-membered