8-membered

Thân thiện

An 8-membered carbon ring is drawn on the whiteboard in the chemistry lecture.

Definition

Adjective: - Having a ring structure composed of eight atoms: The term "8-membered" is used in chemistry to describe a molecule, specifically a cyclic compound, whose ring structure consists of exactly eight atoms. These atoms can be carbon or a combination of different elements.

Usage

• The term is primarily used as a classifying adjective in scientific descriptions of molecular structures.
• It typically precedes the noun it modifies (e.g., "an 8-membered ring").

Examples

• Adjective:
  • The synthesis yielded a stable 8-membered lactone.
  • This particular antibiotic contains a crucial 8-membered ring in its core structure.
  • Chemists are studying the conformational flexibility of 8-membered cyclic ethers.

Advanced Usage

• The term is part of a systematic naming convention in organic chemistry for ring size. Similar terms include "3-membered," "5-membered," "6-membered," etc.
• The hyphen is standard in this adjectival form when preceding a noun.

Variants and Related Words

• Eight-membered: A less common variant written as two words without a hyphen. "8-membered" is the standard form.
• Octatomic ring: A more technical synonym indicating a ring of eight atoms.
• Medium-ring compound: A broader category in organic chemistry that often includes 8-membered to 11-membered rings, which have distinct properties from smaller or larger rings.

Synonyms

• Octatomic (specifically for an eight-atom ring)
• Eight-atom (as in "eight-atom ring")

Notes

• This is a highly specialized term used almost exclusively in chemistry and related scientific fields.
• The "members" refer to the atoms that constitute the ring backbone. The ring can be carbocyclic (all carbon atoms) or heterocyclic (containing at least one non-carbon atom like oxygen or nitrogen).

Học thuật

Adjective

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

Từ đồng nghĩa

• eight-membered