cis-trans isomerism

[′si¦stranz ī′säm·ə‚riz·əm]

(organic chemistry)

A type of geometrical isomerism found in alkenic systems in which it is possible for each of the doubly bonded carbons to carry two different atoms or groups; two similar atoms or groups may be on the same side (cis) or on opposite sides (trans) of a plane bisecting the alkenic carbons and perpendicular to the plane of the alkenic system.

References in periodicals archive

The Cycloporin A is a cis-trans peptidyl-prolyl isomerase (PPlase) which carry on the functions of different proteins by getting in contact with target proteins, actually PPlase catalyzes the cis-trans peptidyl-prolyl isomerization of prolyl-peptide bonds (Sherry et al., 1992; Walsh et al., 1992; Fruman et al., 1994).

cDNA Cloning and Expression of Cyclophilin A (LvCypA) in White Leg Shrimp, Litopenaeus vannamei

Quitevis, "Dynamical solvation effects on the cis-trans isomerization reaction: photoisomerization of merocyanine 540 in polar solvents," The Journal of Physical Chemistry, vol.

Effect of concentration on isomerization of rhodanine derivatives of merocyanine dyes in polar solvents

The effect of temperature on the cis-trans isomerization process of lisinopril was investigated in order to determine different thermodynamic parameters ([DELTA]H, [DELTA]S, and [DELTA]G).

Study of a conformational equilibrium of lisinopril by HPLC, NMR, and DFT

Cti polypeptide is responsible for the localization of cis-trans isomerase in periplasmic space.

Response mechanisms of bacterial degraders to environmental contaminants on the level of cell walls and cytoplasmic membrane

Lischka, "Nonadiabatic molecular dynamics study of the cis-trans photoisomerization of azobenzene excited to the Sj state," The Journal of Physical Chemistry A, vol.

Constraint trajectory surface-hopping molecular dynamics simulation of the photoisomerization of stilbene

For this dimer specie, there are two possible conformers (cis-trans and trans-cis) depending on the positions of the hydrogen atoms bonded to the oxygen atom of the boronic group, whether they are directed away from (trans) or toward (cis) the phenylboronic ring.

Structure characterization of [N-phenylamino(2-boronphenyl)-R-methyl]phosphonic acid by vibrational spectroscopy and density functional theory calculations

Maga, "Cis-trans fatty acid ratios as influenced by product temperatures of extrusion-cooking," Lebensmittel-Wissenschaft & Technologie, vol.

Effect of extruding full-fat soy flakes on trans fat content

The reaction mechanism is similar to other palladium-catalysed cross-coupling reactions and it consists of oxidative addition, cis-trans isomerization, deprotonation (also called alkynylation), and reductive eliminantion steps.

Computational study of the copper-free Sonogashira cross-coupling reaction: shortcuts in the mechanism/Vasevaba Sonogashira ristkondensatsioonireaktsiooni modelleerimine: otseteed reaktsioonimehhanismis