Carbon-13 NMR spectra of chlorophyll a, chlorophyll a′, pyrochlorophyll a and the corresponding pheophytins
✍ Scribed by Simo Lötjönen; Paavo H. Hynninen
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 972 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The ^13^C NMR spectrum (at natural abundance) of monomeric chlorophyll α in acetone‐__d__~6~ has been recorded to re‐examine the assignments of the low field (aromatic‐olefinic) region of the spectrum. The assignments, made by the examination of the fully coupled spectrum and by the use
## Abstract The spontaneous autoxidation (allomerization) of 13^2^(__R__)‐chlorophyll __a__ in methanol produces seven main products containing three epimer pairs. The ^1^H and ^13^C NMR spectra of these products in acetone‐__d__~6~ were recorded on a 500 MHz spectrometer and fully assigned using t
## Molar extinction coefficients of divinyl chlorophyll u, divinyl chlorophyll b, and their pheophytins in ether and 80% acetone are reported.
## Abstract Carbon‐13 NMR spectra of a number of (−)‐__ent__‐kauranoids have been studied. An unambiguous selfconsistent assignment of resonances has been made by considering the changes in chemical shifts produced by the change of substituent(s).
The 500 MHz proton spectra of monomeric bacteriochlorophyll a and chlorophyll a were recorded and assigned. The proton chemical shifts and proton-proton coupling constants were all determined except for the P-5 to P-15 phytyl side-chain protons. The conformational structures of the reduced rings an