Absolute assignments were made of the side-chain amide proton and nitrogen resonances of a series of cobalamins (Cbls, derivatives of vitamin and two cobinamides [ Cbis, analogs in which the axial 5,6-B 12 ) dimethylbenzimidazole (Bzm) ligand has been chemically removed ] in water. The syn and anti
Phosphoric amides. 15N NMR study of the P—N bonding in acyclic and cyclic compounds
✍ Scribed by Agnes M. Modro; Tomasz A. Modro; Piotr Bernatowicz; Wojciech Schilf; Lech Stefaniak
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 211 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
31P and 15N NMR spectra of 11 cyclic and non-cyclic phosphoramidates were measured. Comparison of the closely related structures demonstrated correlation between the bond angles at nitrogen and the 15N NMR chemical shifts and the 1J(P,N) coupling constants. 15N NMR parameters allowed the exo-and endocyclic nitrogens to be distinguished and could be related to the hydrolytic stability of the PÈN bonds.
1997 John Wiley & Sons, ( Ltd.
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