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Rapid optical resolution of electrically neutral cobalt(III) chelate complexes by gel permeation chromatography

Authors
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
585
Issue
2
Identifiers
DOI: 10.1016/0021-9673(91)85099-2
Disciplines
  • Mathematics

Abstract

Abstract Three geometrical isomers of electrically neutral [Co(EBAA)(aa)] [EBAA = ethylenebis(aminoacidate); aa = an amino acidate] complexes have been synthesized and characterized. They have been resolved into the enantiomers, except for symmetrical cis- mer-[Co (EBAA)(aa)] isomers, by gel permeation chromatography on a Sephadex G-10 column with water as the eluent, and their absolute configurations have been determined based on their circular dichroism spectra. It has been revealed that, except for [Co(EBG)(β-ala)] [EBG = ethylenebis(glycinate)], the Δ enantiomers have a substantially greater optical purity.

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