Carbon-13 and proton spin-lattice relaxation times have been discussed in terms of intramolecular motions for solutions of poly(dimethyl-and poly(diphenylphenylene.oxides). The most suitable auto-correlation function seems to be a sum of several exponential modes. Comparison with the results of prev
13C—1H dipolar relaxation in proton-decoupled carbon-13 NMR spectra of polyphenylene oxides
✍ Scribed by F. Lauprétre; L. Monnerie
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 318 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0014-3057
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The broadenings observed in "C MAS NMR spectra, which depend on the sample-spinning speed, were studied, using polycrystalline adamantane. Not only was a monotonic increase of the linewidths with the increase of the spinning frequency observed, but also a novel resonant feature was found. The phenom
## Abstract ^13^C NMR data for forty 1‐pyrroline 1‐oxides, six __2H__‐pyrrole 1‐oxides, three __2H__‐pyrroles, eight 1‐pyrrolines and four related oxaziridines are reported. Comparisons are made with respect to the five‐membered ring carbons, subdividing them as the central carbons, the nitrone car