13C and 'H NMR parameters were measured for isoproterenol in solution. Spin-lattice relaxation rates were considered and C-H and H-H J couplings were determined. The t rotamer was shown to occur in a much greater abundance than the two g rotamers. Dynamics in solution were interpreted in terms of a
Conformational analysis of enalapril (MK-421) in solution by 1H and 13C NMR
β Scribed by Yohko Sakamoto; Yuko Sakamoto; Isao Oonishi; Taichi Ohmoto
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 476 KB
- Volume
- 238
- Category
- Article
- ISSN
- 0022-2860
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Two series of 2,4,6-tris(amino)-s-triazines were studied by 1 H and 13 C NMR. 15 N NMR had previously demonstrated hindered rotation of the acyclic amino substituents (NHallyl, NHpropyl) around the Ar -N bonds at room temperature. In the present work, 1 H and 13 C NMR studies showed that rotation is
## Abstract The 270 MHz ^1^H and 22.6 MHz ^13^C NMR spectra of DLβphosphothreonine in D~2~O have been measured and analysed as a function of pD. The __trans__β__trans__ conformation of the fragment HβΞ±ο£ΏCβΞ±ο£ΏCβΞ²ο£ΏOο£ΏP predominates at all pD values. The CβΞ²βO __gauche__ contribution is notably larger fo