Conformational isomerism in a fully substituted cyclohexane
β Scribed by Detlef Wehle; Lutz Fitjer
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 207 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Conformational changes in N,N-diethyl-14-hydroxy-l2,19-dimethoxypodocarpa-8,11,13-triene-l3-carboxamide were studied by variable-temperature 'H and I3C NMR over the range 228-328 K using three hydrogen and six carbon indicator sites. The parameters A H \* = 48.7 f 2.0 kJ mol-l, AS\* = -23 f 7 J K mo
Single-crystal X-ray study T = 295 K Mean '(CΒ±C) = 0.004 A Γ R factor = 0.053 wR factor = 0.188 Data-to-parameter ratio = 14.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
Inclusion compounds of several monosubstituted cyclohexanes and thiourea have been studied using high-resolution "C CP/MAS NMR spectroscopy. The "C NMR chemical shifts of the substituted cyclohexane ring are sensitive to the conformation of the substituent and allow one to predict qualitatively the