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1H NMR study of the intramolecular rearrangements of the complexes of 2-hydroxypropane-1,3-diaminetetraacetic acid with metal ions

✍ Scribed by Ruifang Song; Fei Li; Liang Li

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
255 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The kinetics of the intramolecular processes of barium(II), zinc(II), cadmium(II) and lanthanum(III) complexes with 2‐hydroxypropane‐1,3‐diaminetetraacetic acid (HPDTA) were investigated by ^1^H NMR spectrometry. A novel result, the slow Δ, Λ conversion process at room temperature for Zn and LaHPDTA chelates, was observed. The best fittings of the experimental spectra were obtained by computer analysis. These indicate that the activation energy of the Δ, Λ conversion process increases with increasing electrostatic potential for these chelates.

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