## Abstract A series of 7‐^13^C‐labeled __o__‐substituted toluene derivatives and carboxyl‐^13^C‐isocrotonic and crotonic acid were synthesized and studied by ^13^C NMR spectroscopy to obtain ^13^C^13^C spin‐spin coupling constants involving the labeled carbon. The __cis__ ^3^__J__(CC) values were
13C13C spin coupling constants in phenanthrene derivatives
✍ Scribed by Stefan Berger; Klaus Peter Zeller
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 469 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The synthesis of six 1‐X‐ (X = OH, OCH~3~, OCOCH~3~, CH~3~, CHO and CN) phenanthrene derivatives with a ^13^C label at C‐1 is described. An analysis of the ^13^C^13^C spin coupling constants shows the importance of π‐interaction for the coupling constant transmission. Small ^13^C^13^C spin coupling constants over 6 bonds are reported.
📜 SIMILAR VOLUMES
## Abstract Five ^13^C‐labelled cyclobutane derivatives were synthesized and the couplings involving the labelled carbon were determined.
## Abstract The ^13^C^13^C spin–spin coupling constants in natural abundance oxetane, thietane, cyclobutanone, bromo‐and chlorocyclobutane have been measured. Furthermore, the ^13^C isotope‐induced changes in the chemical shifts of the different ^13^C nuclei in the molecules mentioned above are re
## Abstract A series of alicyclic compounds with dihedral angles of 0°, 60°, 90°, 120° and 180° between a ^13^C‐labelled carbon atom and a carbon atom separated by three bonds from the label has been synthesized. The vicinal ^13^C^13^C spin coupling constants were measured, and from the results a K