closed-chain
closed-chain — adjective
1. describing a molecule whose atoms form one or more closed rings, with every atom
describing a molecule whose atoms form one or more closed rings, with every atom linked to two neighbours and no loose ends
Benzene is the simplest closed-chain hydrocarbon, with six carbon atoms forming a ring.
closed-chain + hydrocarbon (attributive use)
Dr. Okonkwo drew the closed-chain sugar as a ring of atoms and the open-chain form as a straight strand.
Professor Yilmaz asked the class to draw a closed-chain compound with nitrogen and oxygen forming a five-membered ring.
Factory engineers use closed-chain nylon for hot components because it resists heat better than the straight-chain polymer.
In water, glucose molecules mostly take a closed-chain shape rather than a linear one.
- cyclic
a broader term used in chemistry and mathematics; 'closed-chain' applies only to molecular structure
- ring-structured
less formal, often found in textbooks and teaching materials
- heterocyclic
specifically describes a ring that contains atoms of more than one element, such as carbon and nitrogen together
- open-chain
describes molecules whose atoms are linked in a straight line, not a ring
- acyclic
the general chemical term for any structure that is not cyclic
文法句型
closed-chain + noun
用法筆記
Used almost exclusively as an attributive adjective before nouns such as 'compound', 'structure', 'molecule', and 'hydrocarbon'. The antonym 'open-chain' describes molecules whose atoms form a line with two free ends.