Structural Characterization of Coordination Polymers of Nickel(II) and Zinc(II) with Polycarboxylate Ligands

Abstract

The structural aspects of one-dimensional coordination polymer (1) of nickel(II) with 1,3,5-benzene tricarboxylate and a three-dimensional interpenetrating coordination polymer (2) of zinc(II) with 1,4-benzenedicarboxylate ligand are studied by single crystal X-ray diffraction analysis. Coordination polymer (1) forms a hydrogen bonded three dimensional network structures. The coordination polymer 1 having a composition [Ni3(TMA)2(H2O)12] n where (TMA = trimesate anion), crystallizes in monoclinic crystal system with C2 space group and has a/A, 17.3387(4); b/A, 12.8748(4); c/A, 6.5302(2); β/°111.620(2); V/A3, 1355.20(7). The zinc coordination polymer 2 crystal system is orthorhombic, with space group Pbca. It has a/A, 14.5049(3); b/A, 17.1616(3); c/A, 18.1389(4); V/A3, 4515.27(16). The 1,4-benzenedicarboxylate three dimensional coordination polymer of zinc(II) comprises of novel hydroxo bridged tetranuclear zinc(II) secondary building units and has a composition [Zn2(C6H4C2O4)1.5{(CH3)2SO}2(OH)] n . Topological analysis of the three dimensional coordination polymer 2 shows that it has a two fold interpenetrating net topology. Tetranuclear Zn(II) carboxylate cluster leading to 3D coordination polymer.