Abstract
The cobalt(III) complex incorporating sexidentate linear pentaethylenehexamine(1,14-diamino-3,6,9,12-tetraazatetradecane) as the ligand was prepared by the reaction of the ligand with [CoBr(NH3)5]Br2 at room temperature in the presence of active charcoal. The resulting solution was subjected to column chromatography on SP-Sephadex, geometrical and optical isomers with four different configurations were then separated and characterized by their electronic and infrared absorption, circular dichroism, and PMR spectra. They have the chemical composition of [Co(C10H28N6)]Cl3·nH2O, n being 1.5–3.