Three new zinc(II) complexes constructed by biphenyl-2,2′,6,6′-tetracarboxylic acid: Effect of solvents and terminal ligands

Interaction of biphenyl-2,2′,6,6′-tetracarboxylic acid (H4bta) and Zn(II) ions in DMF led to the formation of a one-dimensional coordination polymer, while in the presence of 1,10-phenanthroline and 1H,1′H-2,2′-biimidazole as terminal ligands in H2O, analogous interactions induced the generation of two-dimensional layers with (6, 3) topology. The bta ligands in these three coordination polymers adopt η4,μ2-tetradentate, η5,μ4-pentadentate and η4,μ4-tetradentate coordination modes, respectively, and the corresponding angles of two benzene rings of bta ligands are 70.52, 83.81 and 73.35°, in accordance with the coordination modes and steric hindrance effect of the terminal ligands.

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