Tris(2,2'-bipyridine-kappa(2) N,N') cobalt(III) bis[bis(pyridine-2,6-dicarboxylato-kappa O-3(2),N,O-6) cobaltate(III)] perchlorate dimethylformamide hemisolvate 1.3-hydrate

In the title compound, [Co(C10H8N2)(3)][Co(C7H3NO4)(2)](2)(-)(ClO4)center dot 0.5C(3)H(7)NO center dot 1.3H(2)O, the Co-III atom in the complex cation is pseudooctahedrally coordinated by six N atoms of three chelating bipyridine ligands. The CoIII atom in the complex anion is coordinated by two pyridine N atoms and four carboxylate O atoms of two doubly deprotonated pyridine-2,6-dicarboxylate ligands in a distorted octahedral geometry. One dimethylformamide solvent molecule and two water molecules are half-occupied and one water molecule is 0.3-occupied. O-H center dot center dot center dot O hydrogen bonds link the water molecules, the perchlorate anions and the complex anions. pi-pi interactions between the pyridine rings of the complex anions are also observed [centroid-centroid distance = 3.804 (3)angstrom].