## Abstract ^13^C n.m.r. studies of a series of tricarbocyclic ring C aromatic diterpenoids using proton‐noise and single‐frequency off‐resonance decoupling, partially relaxed Fourier transform techniques, shift reagents and specifically labelled derivatives have permitted unequivocal assignments o
Carbon-13 Nuclear Magnetic Resonance Spectra of some Fungal Melanins and Humic Acids1
✍ Scribed by Lüdemann, H. D.; Lentz, H.; Martin, J. P.
- Book ID
- 121518912
- Publisher
- The American Society of Agronomy
- Year
- 1982
- Tongue
- English
- Weight
- 189 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0361-5995
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
REFERENCE DATA causes the electron density to be comparatively lower at C-3 and C-5 than at C-2 and C-4, so that the former signals resonate at lower fields. Distinction between the signals of the C-2/C-4 and C-3/C-5 pairs was achieved by comparing the C-H coupling patterns of 5 and 1. Compounds 1,
## Abstract Fourier transform carbon‐13 nuclear magnetic resonance spectra have been obtained and interpreted for some 2‐substituted tetrahydropyrans. The effects of the substituents on α, β, γ and δ‐carbon atoms are discussed. Using suitable reference compounds the γ‐parameter can be used for quan