## Abstract The ^15^N NMR spectra for 21 aminonitropyridines were measured and their chemical shifts assigned. The ^1^H and ^13^C NMR chemical shifts and spinβspin coupling constants were also determined for 16 compounds of this series. In order to relate the structural properties of nitramino grou
Nuclear Magnetic Resonance and X-Ray Study of a Rectangular Phase
β Scribed by Stefan Gustafsson; Per-Ola Quist
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 227 KB
- Volume
- 180
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The metastable state of solid MBBA has been studied by wide line nuclear magnetic resonance. The difference between the metastable and stable states involves reorientation of the benzylidene ring about the pam axis\_ A limited rotation OF the n-butyl chain occurs in both phases above 250 K.
Several 3-dehydro-(or ~-oxo-) ecdysteroids have been prepared by enzymatic and/or chemical means. Methods for their purification using various highperformance liquid chromatography systems are described. Proton and carbon nuclear magnetic resonance analyses show that 3-dehydroecdysteroids when disso