open-chain structure
[/ˈoʊpən tʃeɪn ˈstrʌktʃər/]
nounpl: open-chain structures
estrutura de cadeia aberta
1. A molecular arrangement in organic chemistry where carbon atoms are bonded in a linear or branched sequence with a beginning and an end point, not forming a closed ring
Butane is an example of an open-chain structure with four carbon atoms arranged linearly.
O butano é um exemplo de estrutura de cadeia aberta com quatro átomos de carbono dispostos linearmente.
2. In polymer chemistry, a polymer chain that has unreacted terminal groups rather than forming a cyclic structure
The open-chain structure of the polymer allows for further cross-linking between chains.
A estrutura de cadeia aberta do polímero permite a ligação cruzada adicional entre as cadeias.
This is a specialized chemistry term used consistently across both Brazilian and Portuguese scientific communities. It is fundamental to organic chemistry education and is taught in secondary and higher education chemistry courses in both countries. The terminology remains unchanged across different Portuguese-speaking regions due to the standardized nature of scientific nomenclature.
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