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Selective Detection of the Proton NMR Spectra of Molecules Containing Rare Spins at Natural Abundance in Liquid Crystalline Samples

✍ Scribed by J.W. Emsley; D. Merlet; K.J. Smith; N. Suryaprakash

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
445 KB
Volume
154
Category
Article
ISSN
1090-7807

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✦ Synopsis

It is shown that the proton NMR spectra of molecules containing rare spins at natural abundance dissolved in a liquid crystalline solvent can be obtained free from the strong lines from the spectrum of the abundant isotopomer by the 2D HSQC NMR experiment. The technique can also give the individual chemical shifts of the rare spins, and, for a molecule containing another abundant nucleus, such as fluorine, the rare spin-19 F total anisotropic couplings are also obtained. The usefulness of the technique is demonstrated for molecules containing 13 C as the rare spins.

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The rα-structure of partially oriented 1
The rα-structure of partially oriented 1,2,3,5-tetrachlorobenzene determined from its 1H NMR spectra with natural-abundance 13C-satellites. A Demonstration of the Combined Use of Spectra Obtained from Molecules Dissolved in Several Different Liquid Crystals as Solvents for Spin Systems not having enough Dipolar Coupling Constants to Determine the Molecular Structure
✍ G. Dombi; J. Amrein; P. Diehl 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB

## Abstract It is demonstrated that in a case where neither the proton nor the natural‐abundance ^13^C‐satellite spectra of a partially oriented molecule carry enough structural information, one can determine the entire molecular geometry by the combined use of several liquid crystals as solvents.