The title complex was prepared by the reaction of N,N ' -bis(3-aminopropyl)ethylenediamine (3,2,3-tet) and NaClO 4 in the presence of copper(II) ion. The complex forms a coordination polymer bridged with μ-bidentate perchlorato ligand. The geometry around copper(II) ion is tetragonally distorted octahedron by the coordination of four nitrogens of 3,2,3-tet with square-planar arrangement and two perchlorato ligands in apical sites. An water molecule of the unit complex is located between [Cu(3,2,3-tet)] 2 + and uncoordinated perchlorate with hydrogen bonds.