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Definition of geometrical isomer in English: geometrical isomer(also geometric isomer) noun Chemistry Each of two or more compounds which differ from each other in the arrangement of groups with respect to a double bond, ring, or other rigid structure. 〔化〕几何异构体 Example sentencesExamples - It is now widely recognized that onjugated linoleic acid is not a single chemical entity but a mixture of positional and geometric isomers.
- The naming of geometrical isomers reflects the position of the atoms or groups on each of the carbon atoms in the double bond.
- The enthalpy difference between the two geometrical isomers in the free enzyme appears to be higher than in the substrate-bound enzyme and in the low molecular weight model.
- He used the theory to predict the existence of geometric isomers, two forms of a compound that differ from each other only in the position of a single atom, ion, or group of atoms.
- CLA is a mixture of positional and geometric isomers of linoleic acid and has been reported to inhibit various chemical-induced cancers in rodent models.
Derivativesnoun Chemistry Most cases of geometric isomerism are a result of molecule rigidity which prevents rotation about a double bond. Example sentencesExamples - If there are two different attachments on each side of the double bond then geometrical isomerism results.
- It was shown that in these ionized stereoisomers an effect due to geometrical isomerism appears in two different ways.
- An interesting example of geometric isomerism caused by rings is found in sugars such as glucose, fructose, mannose and galactose.
- Due to geometrical isomerism, two forms of polyethyne are produced: cis-polyethyne and trans-polyethyne.
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