Cobalt(III) Complexes with Quadridentate Ligands. XIII. The Preparation and Properties of cis-α, cis-β1, and cis-β2-Isomers ofthe (2-Oxidephenylacetato)(triethylenetetramine)cobalt(III) Complex

Abstract The cis-α, cis-β1, and cis-β2-isomers of (2-oxidephenylacetato)(triethylenetetramine)cobalt(III) chloride hydrate, [Co(opa)(trien)]Cl·nH2O (opa = 2–oxidephenylacetato, trien = triethylenetetramine), have been prepared and characterized by means of analytical and spectroscopic methods. The cis-α and cis-β1-isomers of this complex were more stable than those of the salicylato- or thiosalicylato(triethylenetetramine)cobalt(III) complexes in basic aqueous solution.