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Ligand conformation in lanthanide complexes by NMR paramagnetic shifts: L-proline and L-valine

✍ Scribed by J. Mossoyan; M. Asso; D. Benlian

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
461 KB
Volume
13
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A fitting procedure is descdribede to establish the conformation and molecular dynamics of flexible molecules co‐ordinated to lanthanide cations from NMR paramagnetic shift data of ^1^H and ^13^C resonances. The results from L‐proline and L‐valine in aqueous solution at low pH values are consistent with peak assignments given by independent methods. A free rotation of the pyrrolidine ring is proposed in the case of L‐proline, and a rigid lock in the case of L‐valine, and angle and distance values are given for the cation and ligand positions in the complex.

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