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

•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.

Graphical abstractTwo 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.Figure optionsDownload full-size imageDownload as PowerPoint slide