## Abstract The chemical shifts of hydrogen bonded protons in complexes of 11 substituted pyridines with trifluoroacetic acid were examined, in five dry solvents of different activity, with respect to proton transfer and aggregation effects. The results were correlated with Ξp__K__~__a__~, the Kirk
Some observations on the NOE effect in 1H NMR spectroscopy
β Scribed by Gerhard Schilling; Bernd Klosterhalfen
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 197 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
The NOE enhancement factor in ^1^H NMR spectroscopy is shown to be a function of dipoleβdipole interaction of the solute. The NOE increases with increasing concentration if a monomerβdimer equilibrium exists in solution.
π SIMILAR VOLUMES
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Studies were performed on 16 cats to evaluate the potential protective effects of Gallopamil on brain ischemia. Brain energy state was determined by 31P NMR and lactate concentration was determined by 1H NMR. Double-tuned surface coils (tuned to 35.8 and 88.4, respectively) were placed on the head a
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## Abstract The ^1^H and ^13^C NMR spectra of methyl (β)βzanzibarate (**1**), an __ent__βlabdanic diterpene isolated from the epicarp of __Hymenaea courbaril__ var. __altissima__ (Leguminosaea, Cesalpinoideae, Detariae), was fully assigned by COSY experiments, ^13^C/^1^H shift correlation diagrams