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13C Chemical-shift tensors in an analogous series of heterosubstituted polycyclic aromatic compounds

✍ Scribed by Dewey H. Barich; Julio C. Facelli; Jian Zhi Hu; D. W. Alderman; Wei Wang; Ronald J. Pugmire; David M. Grant

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
186 KB
Volume
39
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C principal values of the chemical‐shift tensor for fluorene, carbazole, dibenzofuran and dibenzothiophene were determined with the FIREMAT and PHORMAT experiments. Theoretical calculations (DFT) of the tensors were used as an aid to spectral assignment of the tensors, particularly in some positions in which the isotropic chemical shifts were accidentally degenerate. The principal values are discussed in terms of the effects of the heterosubstitutions. Copyright © 2001 John Wiley & Sons, Ltd.

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Substituent effects on 13C13C coupling c
Substituent effects on 13C13C coupling constants and chemical shifts in 13C labelled polycyclic aromatic hydroxy compounds
✍ P. E. Hansen; O. K. Poulsen; A. Berg 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 302 KB

## Abstract The effects of an hydroxy substituent on ^13^C^13^C coupling constants and ^13^C chemical shifts have been measured in 1‐hydroxynaphthalene‐2‐^13^C and 1‐hydroxypyrene‐1‐^13^C. The changes observed in the ^13^C^13^C couplings show the effect of a substituent attached directly to the l