## Abstract Carbon‐13 chemical shifts, spin‐lattice relaxation times and nuclear Overhauser enhancement factors are reported for five polyfluoroaromatic compounds at 28°C. In all cases the relaxation of the fluorine bearing carbon is predominantly dipolar. Effective correlation times are smaller th
Spin-lattice relaxation of 77Se in some organoselenium compounds
✍ Scribed by Otto A Gansow; William D Vernon; James J Dechter
- Publisher
- Elsevier Science
- Year
- 1978
- Weight
- 174 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0022-2364
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The spin-lattice relaxation of lSN nuclei in organic compounds is caused by the dipole-dipole interaction with protons at lower temperatures and by the spin-rotation interaction at higher temperatures. The relaxation times are very long k most compounds. ## 1. lnboduction Even though the 15N NMR s
## Abstract ^6^Li, ^7^Li and ^13^C spin–lattice relaxation and NOE data are reported for methyllithium, butyllithium and phenyllithium with ^6^Li T~1~ values found in the order of tens of seconds and their relaxation 2–3 orders of magnitude less efficient than that for ^7^Li. The data indicate that