Carbon, nitrogen and oxygen NMR spectra of some nitro derivatives of pyrrole and imidazole have been investigated. The 13C chemical shifts of para-carbons and the 170 chemical shifts of the nitro group correlate qualitatively with the electron densities on these carbon and oxygen atoms, which in tur
14N, 15N, and 17O NMR spectra of calcium(II)-amino acid complexes in aqueous solution
✍ Scribed by Masunobu Maeda; Kohji Okada; Kaname Ito
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 264 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0162-0134
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📜 SIMILAR VOLUMES
## Abstract The ^17^O‐NMR. line widths of the enriched amino acids glycine, aspartic acid, glutamic acid and, for comparative reasons, acetic acid were measured in aqueous solution between pH 1 and 14. The ^17^O‐NMR. line‐width maxima of glycine at pH≈︁11 and acetic acid at pH≈︁5 are shown to arise
## Abstract Ternary complexes of amino acids, Cu(II) and diimine ligand 2,2′‐bipyridyl (bpy) are obtained in the gas phase by electrospray ionization (ESI). The amino acids are found to bind to Cu(II) by their deprotonated carboxylate groups in the gas‐phase complexes. Collisionally activated disso
## Abstract Formation constants of ternary complexes of Cu^II^ with (__S__)‐amino‐acid amides (phenylalaninamide, prolinamide, and tryptophanamide) and (__R__)‐ or (__S__)‐amino acids (valine, phenylalanine, proline, and tryptophan) were determined potentiometrically at 25° and __I__ = 0.1M (KC1).