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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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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 Therefore, the compounds that exhibit isomerism are known as isomers The word “isomer” is derived
What Is Isomerism? - BYJUS
What is optical isomerism? Optical isomerism is a kind of stereoisomerism in which the compounds have the same molecular formula but differ in the direction of rotation of plane polarised light Optical isomers are non-superimposable mirror images of each other and are called enantiomers
BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
Isomerism Chemistry Questions with Solutions Q1 What are isomers? Answer: Isomers are pairs of molecules having the same chemical formula but different chemical structures Q2 What are the different types of isomers? Answer: We can predominantly classify isomers into two classes, i e structural isomers and stereoisomers
JEE Main Previous Year Solved Questions on Isomerism
Isomerism previous year questions with solutions are given here Isomerism is most widely observed in organic chemistry and has a huge application in chemistry and medicine Isomers are molecules that have the same molecular formula but have a different arrangement of the atoms in space
What Is Optical Isomerism? - BYJUS
What is optical isomerism? Optical isomerism is a type of stereoisomerism in which the isomers have the same molecular formula and the structural formula but differ in their direction of rotation of plane polarized light
BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
Structural isomerism, also known as constitutional isomerism, features molecules with the same chemical formulae but differently arranged atoms Stereoisomerism is the phenomenon in which multiple molecules have the same chemical formulae but different three-dimensional orientations of the atoms
What are Alkynes? - BYJUS
What are Alkynes? In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon-carbon triple bond The alkynes are unsaturated hydrocarbons that contain one triple bond, the general formula of alkynes CnH2n-2 and the triple bond is known as the ‘acetylenic bond’ Many alkynes have been found in nature Ethyne (C2H2) is the first member of the alkyne family
What are Constitutional Isomers? - BYJUS
Constitutional isomers, also known as structural isomers, are specific types of isomers that share the same molecular formula but have different bonding atomic organization and bonding patterns The three prominent types of constitutional isomers are:
What are Diastereomers? - BYJUS
What are Diastereomers? Diastereomers are defined as compounds which have the same molecular formula and sequence of bonded elements but which are nonsuperimposable, non-mirror images Enantiomers and diastereomers commonly called stereoisomers fall under the broader concept of isomerism which always involves the comparison of at least two species Stereoisomers are molecules of identical

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