Absolute Configuration of (+)₅₈₉-(4,4'-Dimethoxy-2,2'-bipyridine 1,1'-dioxide-O,O')bis(ethylene-diamine-N,N')cobalt(III) Triperchlorate

The complex ion of the title molecule (+)₅₈₉-[Co(C₂H₈N₂)₂(C₁₂H₁₂N₂O₄)](ClO₄)₃, has twofold symmetry and the absolute configuration is Λ. The seven-membered chelate ring of the 4,4′-dimethoxy-2,2′-bipyridine 1,1′-dioxide ligand adopts a chiral skew conformation of δ, which forms a lel structure in the complex ion. The dihedral angle between the two pyridine rings is 61.2 (2)°, and the O—Co—O bite angle is 91.3 (2)°. The ethylenediamine chelates take a δ-gauche conformation in the complex ion.

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