Description:
<jats:title>Abstract</jats:title>
<jats:p>Carbonatocobalt(III) complex of (3S,8S)-3,8-dimethyl-1,4,7,10-tetraazadecane((3S,8S)-dimetrien) was prepared from trans-[CoCl2(3S,8S)-dimetrien)]ClO4 by treating with carbonate or hydrogencarbonate ion. The carbonato complex was assigned to the Λ-cis-β configuration, a novel geometry for the (3S,8S)-dimetrien complexes. The visible absorption, circular dichroism, and proton magnetic resonance data were obtained for the Λ-β and other carbonato complexes. Preparation and assignment of dinitrocobalt(III) complex with (3S,8S)-dimetrien are given. The relative stabilities of the four isomers of (3S,8S)-dimetrien complexes (Λ-cis-α, Λ-cis-β, Δ-cis-β, and trans) are discussed qualitatively.</jats:p>