Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Olefin isomerization, double band

The tertiary enamines, in contrast to the secondary derivatives, cannot exhibit enamine-imine tautomerism. As the free bases, they exist only in the vinylamino form. Their physico-chemical properties are in agreement with this structure, especially the spectral properties. The bands due to the stretching frequency of the carbon-carbon double bond in their infrared spectra1-25-27 (situated at 1630-1660 cm-1 according to the nature of the substituents) occur at somewhat lower frequencies, but their intensities are greatly increased in comparison to those of simple olefins because of conjugation with the free electron pair on the nitrogen atom. Indications of cis-trans isomerism... [Pg.152]

Analysis of the infrared spectra of octene hydrogenation products showed that double bond and skeletal isomerization of unreacted olefin takes place. Comparing the spectrum of pure octene-1 (Fig. 2) with the spectrum of the product from Experiment 1 (Fig. 3), it can be seen that the adsorption peak at 1800 cm. i decreases and the doublet at 900 and 980 cm. i is replaced by a peak at 980 cm. which formerly appeared as a shoulder on the 980 band. [Pg.712]


See other pages where Olefin isomerization, double band is mentioned: [Pg.880]    [Pg.149]    [Pg.419]    [Pg.419]    [Pg.403]    [Pg.468]    [Pg.88]    [Pg.115]    [Pg.304]    [Pg.132]   


SEARCH



Double bands

Double isomerization

Olefin double

Olefin isomerization

Olefins isomerized

© 2024 chempedia.info