Isomerism of the Metal Complexes containing Multidentate Ligands. I. Geometric and Optical Isomers of the Bis(diethylenetriamine)-cobalt(III) Ion

Three possible isomers of bis(diethylenetriamine)cobalt(III) halide were isolated by column chromatography on ion-exchange cellulose and Sephadex, and the mer- and u-facial isomers were completely resolved by column chromatography on SE-Sephadex. These isomers were studied by electronic, infrared, and PMR spectroscopy, and the absolute configuration of the u-facial isomer was assigned on the basis of the circular dichroism spectrum.