Structural and magnetic properties of metal complexes constructed by pyridine-2,6-dicarboxylate and 5-(4-bromophenyl)-2,4′-bipyridine

Pyridine-2,6-dicarboxylic acid reacts as the first ligand (L1) under hydrothermal conditions with different metal ions such as CoII, NiII, and CuII to form two 1D polymeric complexes [M(L1)(L2)2·H2O]n (M = Co2+ or Ni2+) and a tetranuclear cluster with formula [Cu4(L2)4(L1)4]·2H2O in the presence of 5-(4-bromophenyl)-2,4′-bipyridine as the second ligand (L2). Intramolecular interactions were observed in the three compounds, being antiferromagnetic in both cobalt and nickel 1D coordination polymers and ferromagnetic interaction in the tetranuclear copper cluster.