𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C-NMR of double and triple bond carbon atoms of unsaturated fatty acid methyl esters

✍ Scribed by Jan Bus; Izaäk Sies; Marcel S.F. Lie Ken Jie

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
562 KB
Volume
18
Category
Article
ISSN
0009-3084

No coin nor oath required. For personal study only.

✦ Synopsis

Fhe carbon magnetic resonance spectra of many fatty acid methyl esters with cis and trans double bonds and triple bonds at various positions and in many different combinations have been investigated.

The influence of the ester group on double and triple bonds in the fatty acid chain depends strongly on the positions of these bonds. For a given position the influence is constant, even if one or more other double or triple bonds are present.

Together with the evaluated chemical shift parameters for the effects of double and triple bonds on each other, complete assignments are possible and spectra of various types of unsaturated esters can be predicted with high accuracy (± 0.1 ppm).

📜 SIMILAR VOLUMES

Retention behaviour of unsaturated fatty
Retention behaviour of unsaturated fatty acid methyl esters on porous graphitic carbon
✍ Karen Gaudin; Pierre Chaminade; Arlette Baillet 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 513 KB

## Abstract The eluotropic strength of binary mobile phases was calculated for three homologous series of __cis__, __trans__, and __cis__‐__cis__ unsaturated fatty acid methyl esters (FAMEs). Binary mobile phases with chloroform, dichloromethane, or tetrahydrofuran as strong solvent and methanol or

The 13C NMR spectrum of abietic acid and
The 13C NMR spectrum of abietic acid and its methyl ester
✍ William B. Smith 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 155 KB

## Abstract The assignment of lines in the ^13^C NMR spectrum of abietic acid and its methyl ester have been made using carbon __T__~1~ values and lanthanide induced shift effects. Structure–NMR parameter values are briefly discussed.

High-resolution 13C-NMR olefinic spectra
High-resolution 13C-NMR olefinic spectra of DHA and EPA acids, methyl esters and triacylglycerols
✍ R. Sacchi; I. Medina; L. Paolillo; F. Addeo 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 574 KB

The high-resolution 13C-NMR spectra of the olefinic carbons of two major n-3 polyunsaturated fatty acids of fish oils, DHA (22:6, n-3) and EPA (20:5, n-3), were recorded at 100.64 MHz in chloroform-d solutions on standard free acids, methyl esters, Atlantic tuna (Thunnus alalunga) triacylglycerols a

13C NMR determination of the configurati
13C NMR determination of the configuration of methyl-substituted double bonds in medium- and large-ring terpenoids
✍ Gordon L. Lange; Moses Lee 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 342 KB

13C NMR spectroscopy can be used to determine the configuration of methyl-substituted double bonds in medium-and large-ring terpenoid natural products. A number of examples from our investigations in the germacranolide field are presented, and clearly show that if the resonance for the vinylic methy

High-resolution 13C NMR spectra of long-
High-resolution 13C NMR spectra of long-chain acids, methyl esters, glycerol esters, wax esters, nitriles, amides, alcohols and acetates
✍ F.D. Gunstone 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 281 KB

Chemical shifts are reported for long-chain acids, methyl esters, glycerol esters, wax esters, nitriles, amides, alcohols and acetates. These indicate the possibility of using high-resolution ]3C NMR spectroscopy for the analysis of mixtures of these types of compound.