closed chain

Thân thiện

The chemist drew a closed chain in the molecular diagram.

Definition

1. Noun:
   • (Chemistry) A chain of atoms in a molecule that forms a closed loop: In chemistry, a "closed chain" refers to a molecular structure where a sequence of atoms is connected in a ring or cyclic formation, with no open ends. This is a fundamental concept distinguishing cyclic (closed-chain) compounds from acyclic (open-chain) ones.

Examples of Usage

• Noun:
  • Benzene is a classic example of a closed chain of carbon atoms.
  • The stability of many organic compounds depends on the properties of their closed chain structure.

Advanced Usage

• "Closed-chain compound": A more specific term for a molecule featuring one or more closed chains (rings).
  • Cyclohexane is a common closed-chain compound studied in organic chemistry.
• Contrast with "open chain": Often used to highlight the structural difference between cyclic and linear or branched molecules.
  • Butane is an open-chain hydrocarbon, whereas cyclobutane is its closed-chain counterpart.

Variants and Related Words

• Ring (n): A common synonym for a closed chain in chemistry, especially when referring to the shape.
  • A six-membered carbon ring.
• Cyclic compound (n): A broad term for any molecule containing one or more closed chains of atoms.
  • Many sugars exist as cyclic compounds in solution.
• Acyclic (adj): Describing a molecule that does not contain any closed chains; having an open chain structure.
  • Acyclic alkanes are also called paraffins.

Synonyms

• Ring structure: Emphasizes the geometric ring shape of the atom chain.
• Cyclic structure: Highlights the closed, loop-like nature of the molecular backbone.

Related Phrases / Terms

• Form a closed chain: The action of atoms connecting to create a ring.
  • These five carbon atoms form a closed chain.
• Closed-chain system: Refers to the entire molecular system based on ring structures.
  • The molecule's reactivity is altered by its closed-chain system.

Notes on Meaning

• The term is almost exclusively used in scientific contexts, particularly in chemistry and biochemistry. It is a technical descriptor for molecular topology.
• It is the conceptual opposite of an open chain or straight-chain molecule.

Học thuật

Noun

1. (chemistry) a chain of atoms in a molecule that forms a closed loop

Từ đồng nghĩa

• ring