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Cis, trans isomerization of conjugated linoleates by lodine and light
Author(s) -
Tolberg W. E.,
Wheeler D. H.
Publication year - 1958
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02632551
Subject(s) - cis–trans isomerism , conjugated system , isomerization , infrared , chemistry , ultraviolet , photochemistry , absorption (acoustics) , infrared spectroscopy , stereochemistry , materials science , organic chemistry , polymer , catalysis , physics , optics , optoelectronics , composite material
Summary Infrared and ultraviolet studies have shown that the three geometrically isomeric types of conjugated linoleates ( cis, cis; cis, trans ; and trans, trans ) are readily equilibrated by dilute iodine and light. Infrared shows that the equilibrium is at 32% cis, trans and 64% trans, trans isomer. Probably no more than 5–10%, if any, cis, cis isomer exists at equilibrium. The equilibrated mixture can be used to determine total conjugation in mixtures of conjugated geometric isomers by either infrared or ultraviolet absorption.