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Acta Cryst. (2013). E69, m616-m617
[ doi:10.1107/S1600536813028298 ]

Poly[[([mu]2-benzene-1,3-di­carboxyl­ato){[mu]2-1,4-bis­[(1H-imidazol-1-yl)meth­yl]benzene}­cadmium] di­methyl­formamide monosolvate]

Y. Chen, D. Wang, L. He, W. Li and J. Suo

Abstract: The title coordination polymer, {[Cd(C8H4O4)(C14H14N4)]·C3H7NO}n, was synthesized by solvothermal reaction of metallic cadmium with the semi-rigid neutral ligand 1,4-bis­[(1H-imidazol-1-yl)meth­yl]benzene (bix) and the V-shaped benzene-1,3-di­carb­oxy­lic acid (m-H2bdc). The structure exhibits a pseudo-C-centring which is almost fulfilled by the polymeric metal complex but not by the solvent dimethylform­amide (DMF) mol­ecules. The asymmetric unit contains two independent CdII ions, two m-bdc2- ligands, one and two half bix ligands, and two solvent DMF mol­ecules. The CdII ions are both five-coordinated by three O atoms from two different m-bdc2- ligands and two N atoms from two different bix ligands in a distorted square-pyramidal geometry. The m-bdc2- ligands adopt a chelate-monodentate coordination mode, connecting neighboring CdII ions into a zigzag chain parallel to [110]. Adjacent chains are further cross-linked by bix ligands, giving rise to a puckered sheet nearly perpendicular to the chain direction. Thus, each CdII ion is connected to four neighboring CdII ions through two m-bdc2- anions and two bix ligands, giving rise to the final non-inter­penetrating uninodal layer with sql (4,4) topology.

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