Tetranuclear Zn(II) and mononuclear Ni(II) based coordination polymers derived from a pair of isomeric 1,2,4-triazole ligands 3,5-disubstituted by pyridine and acetate ethyl ester groups

Competition between metal-ion complexation and ligand decomposition has been observed for a pair of isomeric compounds having pyridyl, 1,2,4-triazole and carboxyl groups simultaneously, where a tetranuclear Zn4(L1)4 based 3D cluster-organic framework C1 and a hexanuclear Ni(II) based 3D coordination polymer C3 have been yielded, respectively.88