Poly[chlorido[μ4-2,2′-(2-methyl-1H-benzimidazol-3-ium-1,3-diyl)diacetato]zinc]

Abstract

The title compound, [Zn(C12H11N2O4)Cl]n, contains a centrosymmetric dimetal tetracarboxylate paddle-wheel moiety in which the ZnII atom is square-pyramidally coordinated by four carboxylate O atoms at the basal positions and one Cl− anion at the apical position. Each paddle-wheel unit is joined to four such neighbours through bridging dicarboxylate ligands, producing a two-dimensional undulating layer parallel to (-101). Adjacent sheets are stacked in a parallel fashion to form a three-dimensional supramolecular structure which is stabilized by interlayer π–π interactions between benzene rings, with a centroid–centroid distance of 3.722 Å. The range of Zn—O bond lengths is 2.0440 (17)–2.1256 (15) Å and the Zn—Cl bond length is 2.2622 (6) Å.