Synthesis, crystal structure and magnetism of a three-dimensional Mn(II) coordination polymers with 2,5-dimethylpyrazine-1,4-dioxide as bridging ligand

Abstract

A novel three-dimensional Mn(II) coordination polymer, {[Mn(μ1,6-dmpzdo)3] · (ClO4)2} n , has been synthesized with 2,5-dimethylpyrazine-1,4-dioxide (dmpzdo) as a bridging ligand and its crystal structure determined by X-ray crystallography. The complex crystallizes in a trigonal system with a space group R-3 and a = 11.6672(14), b = 11.6672(14), c = 16.652(4) Å. In the complex each Mn(II) is coordinated by six μ1,6-dmpzdo bridging ligands and each μ1,6-dmpzdo bridging ligand coordinates two Mn(II) ions, forming a three-dimensional structure. The variable temperature (4–300 K) magnetic susceptibility data gave the magnetic coupling constant 2J = −0.30 cm−1.