✦ LIBER ✦

The complexation of calcium(II) and lanthanide(III) cations with the phosphate substitute (carboxymethoxy)succinate (CMOS), as studied by magnetic resonance spectroscopy

✍ Scribed by C. A. M. Vijverberg; J. A. Peters; W. M. M. J. Bovée; H. Vroon; A. P. G. Kieboom; H. van Bekkum

Book ID: 104588512
Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 834 KB
Volume: 102
Category: Article
ISSN: 0165-0513
DOI: 10.1002/recl.19831020502

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✦ Synopsis

Abstract

The complexation of trisodium (carboxymethoxy)succinate (Na~3~CMOS) with calcium(II) and with lanthanide(III) cations has been studied using NMR spectroscopy. Structural information has been obtained from lanthanide‐induced shifts (LIS), T~1~ relaxation rate enhancements and vicinal ^1^H coupling constants. CMOS forms 1:1 and 1:2 complexes in which it mainly acts as a tetradentate ligand via the three carboxylate groups and the ether oxygen. LIS measurements on non‐racemic mixtures of Na~3~CMOS indicate self‐association of the Ln(III) complexes at [CMOS]~0~ > 0.01 M.

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