The inÑuence of hydrogen bonding (HB) on the 13C chemical shift tensors in four solid amino acids was studied by the ab initio gauge-included atomic orbital (GIAO) approach. The results of the present calculations were compared with those predicted previously and with the experimentally observed shi
Solid-State 13 C Chemical Shift Tensors in Terpenes. 2. NMR Characterization of Distinct Molecules in the Asymmetric Unit and Steric Influences on Shift in Parthenolide
✍ Scribed by Harper, James K.; McGeorge, Gary; Grant, David M.
- Book ID
- 126416991
- Publisher
- American Chemical Society
- Year
- 1999
- Tongue
- English
- Weight
- 141 KB
- Volume
- 121
- Category
- Article
- ISSN
- 0002-7863
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📜 SIMILAR VOLUMES
The spinning sidebands observed in the 13 C MAS NMR spectra (Fig. 1a), oriented in a nematic phase and in the solid state of cis,cis-mucononitrile oriented in liquid-crystalline media and of are presented. As a consequence of the carbon-13 chemicalthe neat sample in the solid state are studied. Ther
## Abstract The ^13^C and ^15^N CPMAS NMR spectra of 18 pyrazoles substituted at position 1 by dinitrophenyl and trinitrophenyl (picryl) groups have been recorded. To help in the assignments, some of these compounds were studied in DMSO‐__d__~6~ solution. Phenomena such as the conformation of the _
We demonstrate a dipolar-chemical shift correlation technique for sign-sensitive determination of the torsion angle in solid peptides and proteins under magic-angle spinning. The indirect dimension of the experiment is obtained by separate but synchronous evolution of the magnetization under the 15
We have recorded high-resolution l3C-nmr spectra of collagen fibrils in the solid state by the cross-polarization-magic-angle-spinning (CP-MAS) method and analyzed the spectra with reference to those of collagenlike polypetides. We used two kinds of model polypeptides to obtain reference 13C chemica