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isomerism

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n. 异性

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异性

WordNet (r) 3.0 (2006) (WordNet)

isomerism
n 1: the state of being an isomer; the complex of chemical and
physical phenomena characteristic of isomers

The Collaborative International Dictionary of English v.0.48 (gcide)

Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
[1913 Webster]

{Physical isomerism} (Chem.), a former term for {optical
isomerism}.

{optical isomerism} (Chem.), the condition or relation of
certain (isomeric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids, or the sugars galactose and glucose. In such
compounds there is usually at least one unsymmetrical
carbon atom and typically more than one. See
{Unsymmetrical}.
[1913 Webster PJC]

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Isomerism | Definition, Types, Examples | Britannica
Isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties Isomers are chemical compounds that have the same parts but are not the same
Isomer - Wikipedia
Two main forms of isomerism are structural (or constitutional) isomerism, in which bonds between the atoms differ; and stereoisomerism (or spatial isomerism), in which the bonds are the same but the relative positions of the atoms differ Isomeric relationships form a hierarchy
1. 5: Isomerism - Chemistry LibreTexts
Isomers are molecules with the same molecular formulas, but different arrangements of atoms There are several different types of isomers which will be described and a flowchart (see figure below) can help you determine which type of isomers are present Isomer flowchart, by Vladsinger
What is Isomerism? - BYJUS
What is Isomerism? Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers
Isomer: Definition, Types, Structures, and Examples - Chemistry Learner
Isomers are structures with the same molecular formula and chemical composition but different arrangements of atoms in space [1-4] There are two main types of isomers: structural isomers and stereoisomers [1-8] Structural isomers are also called constitutional isomers

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