The synthesis and characterization of facial and meridional isomers of uns-cis-(ethylenediamine-N-N’-di-3-propionato) cobalt(III) complexes with S-lysine and S-histidine

Abstract

In the reaction of sodium uns-cis-(ethylenediamine-N-N’-di-3-propionato)-(carbonato)cobaltate(III) dihydrate and the corresponding amino acid (S-lysine or S-histidine) at 70"C, both the theoretically possible facial and meridional isomers of the uns-cis-(ethylenediamine-N-N’-di-3-propionato)(aminoacidato)cobalt(III) complexes were prepared. The complexes were isolated chromatographically and characterized by elemental analyses, as well as by electron absorption and infrared spectroscopy.

Keywords

• cobalt(III) complexes
• ethylenediamine-N-N’-di-3-propionato ligand
• S-lysine
• S-histidine