Anion-tunable architectures of Zn(II) complexes of a bis-pyridyl-bis-amide ligand: Syntheses, crystal structures and properties

Through natural evaporation of the reaction solutions of ZnX2 (X = Cl−, CH3COO− and SCN−) and the ligand 2,6-bis(pyridine-4-carboxamido)pyridine (L), three new zinc(II) complexes with different structures of helical chain, discrete dimer and zigzag chain were obtained. Interestingly, the coordination numbers of ZnII as well as the molecular and supramolecular structures of the resulting coordination complexes are obviously tuned with the X anion used.