catena-Poly[[diaquabis(formato-κO)cobalt(II)]-μ2-2,6-bis(pyridin-4-yl)-4,4′-bipyridine-κ2N2:N6]

Abstract

In the title complex, [Co(CHO2)2(C20H14N4)(H2O)2]n, the CoII ion, lying on an inversion center, is six-coordinated by two O atoms from two monodentate formate ligands, two N atoms from two 2,6-bis(pyridin-4-yl)-4,4′-bipyridine (4-pybpy) ligands and two water molecules, displaying an octahedral geometry. The 4-pybpy ligand, having a twofold rotation axis, functions in a bridging coordination mode, connecting the CoII ions into a corrugated chain along [overline{1}01]. The chains are further linked into a three-dimensional supramolecular network by O—H...O, C—H...N and C—H...O hydrogen bonds and π–π stacking interactions between the pyridine rings [centroid-to-centroid distance = 3.743 (2) Å].