3-Diazopyrroles—IV. Structure determination using 13C NMR spectroscopy
✍ Scribed by Girolamo Cirrincione; Anna Maria Almerico; Enrico Aiello; Gaetano Dattolo; R.Alan Jones
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 172 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1386-1425
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## Abstract ^13^C NMR spectroscopy was used to investigate the structures of a series of pure isomeric cresylic novolak resins. Chemical shifts were measured and assigned, and end groups were distinguished from the central repeat units of the chains. Based on these measurements, the number average
## A" pletely substituted by heteroatoms often presents difficulties. Conventional 13C-NMR spectroscopy certainly provides signals; however, in many cases these cannot be interpreted unambiguously. Here we show that by analyzing the l3C-I3C satellites of a 13C-NMR spectrum the bonding pattern of C