Preparation and Resolution of Bis[tris(2-aminoethaneselenolato)cobalt(III)-μ-Se, μ-Se′, μ-Se″]cobalt(III) Complex

The title Se-bridged complex, [CoIII{CoIII(aese)3}2]3+ (aese=2-aminoethaneselenolate), was newly prepared by the reaction of fac-[Co(aese)3] with Co2+ and separated into three isomers, ΔΔ, ΔΛ, and ΛΛ, by the ion-exchange chromatographic method. The isomers were characterized from their absorption, CD, and 13C NMR spectra.