Catena-poly[bis[aqua(2,2-bipyridine-kappa 2N,N')cobalt(II)]-mu-1,2,4,5-benzenetetracarboxylato-kappa 4O1:O2:O3:O4]

In the title complex, [Co(2)(C(10)H(2)O(8))(C(10)H(8)N(2))(2)(H(2)O)(2)], the four carboxylate groups are fully deprotonated and coordinate to four Co(II) cations in a monodentate fashion, forming a one-dimensional ribbon-like double-chain structure, with centrosymmetric [Co(2)(C(10)H(2)O(8))(C(10)H(8)N(2))(2)(H(2)O)(2)] repeating units and a cavity of approximately 6.8 x 6.6 A. Moreover, a three-dimensional supramolecular structure is formed by face-to-face pi-pi interactions between the aromatic rings of the 2,2'-bipyridine moieties of two adjacent chains, and by hydrogen-bonding interactions between the coordinated aqua O atom and the coordinated carboxyl O atom from different chains.