Coupling of NMR absorption to the motion of nonaxisymmetric vortices in rotating3He-B
โ Scribed by E.B. Sonin; Y. Kondo; J.S. Korhonen; M. Krusius
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 173 KB
- Volume
- 194-196
- Category
- Article
- ISSN
- 0921-4526
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๐ SIMILAR VOLUMES
Long-range couplings were observed between protons attached to c-2 and c-5 of the 4-imidazolidinone ring. Smce 45(25) has a measurable value only for a trans arrangement of H-2 and H-5, this coupling can be utilized as an easy method of identification of 4-imidazolidinone stereoisomers.
## Abstract The complementary NMR techniques of longโrange Wโplan coupling and substituent shift effects on nearby olefinic hydrogens have been used to assign the stereochemistry of 3โphenylโ and 3โacetylโdehydroisoquinuclidines (2 to 5).