Poly[diaqua[μ-1,4-bis(1H-imidazol-1-yl)benzene-κ2N3:N3′](μ-fumarato-κ2O1:O4)nickel(II)]

Abstract

In the title compound, [Ni(C4H2O4)(C12H10N4)(H2O)2]n, the NiII ion has a distorted octahedral coordination geometry. The asymmetric unit is composed of an Ni2+ ion, located on a twofold rotation axis, one half of a 1,4-bis(1H-imidazol-1-yl)benzene (BIMB) ligand and one half of a fumarte (fum2−) dianion, both ligands being located about inversion centers, and a coordinating water molecule. The NiII ions are linked by two BIMB ligands and two fum2− dianions, forming a four-connected layered structure parallel to (010) with a 44-sql topology. Within each layer, there are rhombic grids with dimensions of ca 13.5 × 9.0 Å and approximate angles of 109 and 70°. The crystal packing features a two-dimensional → two-dimensional parallel/parallel interpenetration in which one undulating layer is catenated to another equivalent one, forming a new bilayer. Moreover, the entangled two-dimensional layers are connected by O—H...O and C—H...O hydrogen bonds, generating a three-dimensional structure.