geometric isomer

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Related to geometric isomer: Optical isomers

ge·o·met·ric i·som·er·ism

a form of isomerism displayed by unsaturated or ring compounds where free rotation around a bond (usually a carbon-carbon bond) is restricted, for example, the isomerism of a cis- or trans- compound as in oleic acid and elaidic acid. Compare: cis-, entgegen, trans-, zusammen.
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geometric isomer

A chemical compound having the same molecular formula as another but a different geometric configuration, as when atoms or groups of atoms are attached in different spatial arrangements on either side of a bond or a ring.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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Complexes of [L.sub.1] and [L.sub.2], namely, Na[Co[([L.sub.1]).sub.3]], Na[Cu[([L.sub.1]).sub.3]], Na[Ni[([L.sub.1]).sub.3]], [[Cu([L.sub.2])].sub.2], and Na[Co[([L.sub.2]).sub.3]], were separated into their geometric isomers using an adaptation of the method described by Glodjovic et al.
From previous studies, tris-chelate complexes exhibited two possible geometric isomers, namely, the facial cis-cis and meridional cis-trans isomers.
From this viewpoint, UV-Vis spectra of the geometric isomers for Na[Co[([L.sub.1]).sub.3]], [[Cu([L.sub.2])].sub.2], and Na[Co[([L.sub.2]).sub.3]] were obtained.
halys adults and nymphs are, indeed, attracted to methyl (E,E,Z)-2,4,6-decatrienoate and related geometric isomers. Surprisingly, methyl 2,4,6-decatrienoates also attracted significant numbers of the native green stink bug, Acrosternum hilare (Say) (Aldrich et al.
The geometric isomers of methyl 2,4,6-decatrienoate, including pheromones of at least two species of stink bugs.

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