## Abstract Carbon‐13 NMR spectra have been obtained for aldrin, dieldrin, isodrin, endrin, heptachlor, heptachlor oxide and 24 of their degradation/conversion products. Chemical shifts were assigned on the basis of (1) comparison among the spectra, (2) single frequency, off‐resonance decoupling ex
Carbon-13 NMR spectra of some chlorins and other chlorophyll degradation products
✍ Scribed by K.M. Smith; J.F. Unsworth
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 701 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4020
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The study of 28 specially selected compounds containing chlorine shows that 13C NMR signals of the CCI,, CCl3CH, and CH,CI groups are registered in the ranges of 93 to 105,49 to 71 and 38 to 59 ppm (from TMS), respectively and are readily identified in 13C NMR spectra of polychloro compounds. The we
## Abstract Carbon‐13 signal assignments of the labdane diterpenoids phlogantholide‐A, its diacetate and isophlogantholide‐A are reported. The assignments of the ^13^C NMR signals of 14‐deoxyandrographolide and its diacetate, made earlier, have now been confirmed by lanthanide shift studies on the