Cobalt(III) Complexes with Tripodlike Quadridentate Ligands. II. Preparations, Absorption Spectra and Circular Dichroism of (Amino carboxylato or 1,2-diamine)[N,N-bis(2-aminoethyl)glycinato]cobalt(III) Complexes

Four glycinato, six l-alaninato, and three (R)-propylenediamine cobalt(III) complexes of a tripodlike quadridentate ligand, N,N-bis(2-aminoethyl)glycinate have been prepared. The geometrical configurations are assigned on the basis of their absorption and circular dichroism spectra, 1H-NMR spectra, the elution behavior in ion-exchanger column chromatography, and the optical resolution of chiral isomers. The absolute configurations of the chiral complexes are tentatively assigned and the characteristics of the tripodlike ligand are discussed.