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The 13C n.m.r. spectra of polysubstituted benzenes. 1—the use of hexachlorobenzene as a reference for the structure elucidation of multisubstituted polychlorobenzenes

✍ Scribed by C. A. Heaton; M. H. Hunt; O. Meth-Cohn

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
234 KB
Volume
10
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The use of ^13^C n.m.r. for structure elucidation of a series of products obtained by reaction of dialkylamines with 1,2‐dinitrotetrachlorobenzene has shown that the general problem of non‐additivity of substituent effects of contiguously substituted benzenes may be overcome, with these products, by the choice of a suitable standard. In this case hexachlorobenzene was used and the difference between the actual and calculated chemical shifts was small, allowing unambiguous structural assignment.

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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.