stereoisomerism


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Related to stereoisomerism: geometrical isomerism

stereoisomerism

 [ster″e-o-i-som´er-izm]
the relationship between two or more isomers that have the same structure (the same linkages between atoms) but different configurations (spatial arrangements), in contrast to constitutional isomerism in which the isomers have different structures. Stereoisomers are further classified into enantiomers, those having molecules that are mirror images of each other, and diastereoisomers, those that do not. adj., adj stereoisomer´ic.
Stereoisomerism, exemplified by a pair of cis-trans diastereoisomers. From Dorland's, 2000.

ster·e·o·i·som·er·ism

(ster'ē-ō-ī-som'ĕr-izm),
Molecular asymmetry, isomerism involving different spatial arrangements of the same groups (for example, androsterone and isoandrosterone, differing only in that one has a 3α-OH, the other a 3β-OH).
See also: stereoisomer, Le Bel-van't Hoff rule.

ster·e·o·i·som·er·ism

(ster'ē-ō-ī-som'ĕr-izm)
Molecular asymmetry; isomerism involving different spatial arrangements of the same groups.
See also: stereoisomer

stereoisomerism

Mirror-image molecular asymmetry. Also known as CHIRALITY. In the case of amino acids, the two forms are represented on paper with the carboxyl group of the carbon chain at the top. In the Laevo (L) form, the functional groups connected to the central carbon or carbon chain are shown as projecting to the left and in the dextro (D) form they are shown projecting to the right.
References in periodicals archive ?
Coverage includes types and properties of polymers, determination of elements, functional groups, determination of monomer ratios in copolymers, sequencing of monomer units in polymers, and stereoisomerism and tacticity regioisomerism.
Allen was next, discussing "Theories of Colour Vision", including some of his own research; and Parker carried on with an explanation of "Stereoisomerism".
The stereoisomerism of each metabolite was determined on the basis of its retention time.
II) Pharmacodynamic factors: Stereoisomerism contributes to different pharmacological activity of local anesthetics and is an important factor to decide the relative potency.
Topics covered in the 35 illustrated chapters include: standards for measurement, properties of matter, early atomic theory and structure, chemical equations, solutions, chemical equilibrium, nuclear and organic chemistry, polymers, aldehydes and ketones, stereoisomerism, carbohydrates, enzymes, nutrition, bioenergetics, and metabolism.