Synthesis and Characterization of One-Dimensional Coordination Polymers, N [M=ZnII, CdII, Pyz = Pyrazine, and Sac = Saccharinate]

Abstract

Two new coordination polymers, [M(sac)2(μ-pyz)(H2O)2]n [M=ZnII(1), CdII(2), pyz = pyrazine, and sac = saccharinate], have been prepared and characterized by elemental analysis, FTIR spectroscopy, thermal analysis and single crystal X-ray diffraction. Both complexes are isomorphous and crystallize in the triclinic P 1 space group. The metal(II) ions are octahedrally coordinated by two sac, two aqua and two pyz ligands. The sac ligands are N-coordinated, while the pyz ligands are bridges between the metal centers, leading to one-dimensional linear chains. Intra-chain M-M separations in 1 and 2 are 7.218 and 7.498 Å, respectively. The individual chains are linked by strong OW-H⋯O(sac) hydrogen bonds into two-dimensional layers, which are further assembled into three-dimensional supramolecular networks by aromatic π(sac)⋯π(sac) stackings interactions. © 2008 Taylor & Francis.