closed chain
Definition
- 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.
Noun
-
(chemistry) a chain of atoms in a molecule that forms a closed loop
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