Syntheses, structures and magnetic properties of five 5-bromoisophthalate coordination polymers with dipyridyl-type auxiliary ligands

Five 5-bromoisophthalate coordination polymers were prepared and structurally characterized. Complexes 1–3 are 2D double-layered networks constructed from 1D [M2(5-Br-ip)2]n (M = CoII/NiII/ZnII) double chains pillared by azpy and 4,4′-bipy spacers. Complexes 4 and 5 are 3D porous MOFs assembled by 2D wave-like [Zn(bpmba)]n networks connected by 5-Br-ip2− linkers. Complexes 1 and 2 show weak antiferromagnetic couplings in carboxylate-bridged Co2(CO2)2 and Ni2(CO2)2 dimers.