Structural and magnetic characterization of 1-D complexes constructed from pyrazole-3,5-dicarboxylate bridging multi copper(II) centers

► Doubly bridged [Cu3(DPA)3(μ-pzdc)(μ-N3)](ClO4)2·2H2O (1) was structurally characterized. ► The perchlorato [Cu3(DPA)3(μ-pzdc)(μ-ClO4)](ClO4)2·3H2O (2) was iso-structural with 1. ► Pyrazole-3,5-dicarboxylate (pzdc) is bridging three Cu(II) centers in polymeric 1D system. ► The complexes exhibit weak anti-ferromagnetic coupling.