Piperazine-1,4-diium bis(pyridine-2,6-dicarboxylato-κ3O2,N,O6)cobaltate(II) tetrahydrate

Abstract

The asymmetric unit of the title complex, (C4H12N2)[Co(C7H3NO4)2]·4H2O, consists of one piperazinediium dication, one [Co(py-2,6-dc)2]2− dianion (where py-2,6-dc is pyridine-2,6-dicarboxylate) and four water molecules. The piperazinediium cation adopts a chair conformation and the CoII ion is six-coordinated in an N2O4 environment, having a distorted octahedral geometry. In the crystal, intermolecular O—H...O, N—H...O and weak C—H...O hydrogen bonds link the components, forming a three-dimensional network.