Two cobalt and nickel coordination polymers constructed from 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene: Crystal structure and magnetic properties

Two transition metal compounds based on 1,4-bis(1,2,4-triazol-1- ylmethyl)benzene ligand have been achieved. Both compounds exhibit 2D network structure. The magnetic studies show that cobalt compound exists important antiferromagnetic coupling transmitted by oxalate ligands. [Display omitted] •New transition metal coordination polymers with flexible bis(N-heterocycle) ligand.•Both complexes show 2D network.•The oxalate ligands mediate important antiferromagnetic coupling in cobalt complex. Two new transition metal coordination polymers with 1,4-bis(1,2,4-triazol-1-ylmethyl)-benzene(btx), [Ni(btx)(ip)(H2O)] (1) and [Co(btx)(ox)]·2H2O (2) (H2ip=isophthalic acid; ox=oxalate) have been synthesized and characterized. Single crystal X-ray diffraction analyses reveal compounds 1 and 2 are two-dimensional structure in which the flexible bis(triazole) ligands act as bridging ligands. The variable-temperature magnetic susceptibility data show that two compounds exhibit weak antiferromagnetic interactions. The magnetic behaviors are explained in connection with the crystal structure.