catena-Poly[[aqua(2,2′-bipyridyl)cobalt(II)]-μ-5-nitroisophthalato]

In the crystal structure of the title compound, [Co(C8H3NO6)(C10H8N2)(H2O)]n, there are two symmetry-independent one-dimensional coordination polymers, which are approximately related by noncrystallographic inversion symmetry. Each zigzag chain is constructed from one CoII ion, one O-monodentate 5-nitroisophthalate (ndc) dianion, one N,N′-bidentate 2,2′-bipyridyl ligand and one water molecule. A symmetry-generated O,O′-bidentate ndc dianion completes the cobalt coordination environment, which could be described as very distorted cis-CoN2O4 octahedral. The bridging ndc ligands result in parallel chains running along the a direction, and O—H...O hydrogen bonds arising from the water molecules complete the structure.

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