four-membered

Thân thiện

A chemist draws the structure of a four-membered ring compound.

Definition

1. Adjective:
   • Of a chemical compound having a ring with four members: Describes a chemical structure, specifically a ring or cyclic compound, that consists of exactly four atoms in its ring system.

Usage

• The term "four-membered" is a technical adjective used almost exclusively in chemistry to classify and describe the size of a ring in a cyclic molecule. It is typically placed before a noun (e.g., "four-membered ring") or used predicatively.

Examples

• Adjective:
  • Oxetane is a common example of a four-membered heterocyclic compound.
  • The strain in a four-membered ring is higher than in a six-membered ring like cyclohexane.
  • The synthesis of stable four-membered lactones is a challenging area of research.

Advanced Usage

• "Four-membered ring system": A common phrase specifying the structural feature.
  • The drug's unique activity is attributed to its embedded four-membered ring system.

Variants and Related Words

• Three-membered, five-membered, six-membered (adj): Similar adjectives describing rings with three, five, or six atoms, respectively.
  • Cyclopropane has a three-membered ring, while benzene has a six-membered ring.

Synonyms

• Tetratomic ring (n): A less common synonym focusing on the four-atom composition.
• Four-atom ring (n): A descriptive synonym.

Notes

• The term is a closed compound adjective ("four-membered") and is not typically used in idiomatic expressions or as a phrasal verb due to its highly specialized scientific nature.

Học thuật

Adjective

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

Từ đồng nghĩa

• 4-membered