## Abstract The solidβstate and solution conformations of (+)βchelidonine (1), a biologically active alkaloid, were determined by Xβray diffraction and ^1^HβNMR spectroscopy, XβRay diffraction analysis revealed a conformer with B/C β__anti__βtypeβ __cis__ conjunction, a halfβchair of ring B, and a
Comparison of intramolecular hydrogen-bonding conformations of sucrose-containing oligosaccharides in solution and the solid state
β Scribed by David B. Davies; John C. Christofides
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 405 KB
- Volume
- 163
- Category
- Article
- ISSN
- 0008-6215
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π SIMILAR VOLUMES
The 13 C cross-polarization magic angle spinning NMR spectra of N-( ) indicate a keto-hydroxy tautomerism of 1 but not of 2. This was confirmed by a single-crystal x-ray diffraction study of 1, which revealed that the two distinct molecules in the unit cell are linked by intermolecular hydrogen bon
Nuclear magnetic resonance spectroscopy was combined with X-ray crystallography to determine the solution and solid-state conformations of glyburide (C23H28ClN305S). In solution, there is apparently free rotation about several of the single bonds. Crystals of glyburide belong to space group P2,ln wi