The crystal structure is solved by the Patterson method and refined by full-matrix least squares treatment on F2 to final values R1 = 0.0447 and wR2 = 0.1053. <...> The CuII ions are fivecoordinated in a CuO3N2 environment, giving a distorted square-based pyramidal geometry. <...> The structure of the title compound is polymeric and consists of layers running parallel to (101 ), interconnected by — interactions, strong enough to form a three-dimensional framework with tunnels along the a axis. <...> DOI: 10.15372/JSC20170127 Keywords: mixed-ligand copper(II) complex, X-ray diffraction, stacking interactions, five-coordination of Cu(II), zigzag polymeric chain complex. <...> The design and synthesis of discrete and polymeric metal-organic complexes based on 1,10-phenanthroline derivatives have received much interest because of their structure and topology-directing properties and wide applications [ 1—5]. <...> These complexes can be specially designed by a careful selection of metal cations with preferred coordination geometries, considering also the nature of the anions, the structure of the connecting ligands and the reaction conditions [ 6, 7 ]. <...> Usually, two different types of interactions, such as covalent bonds and noncovalent intermolecular forces, are used to construct various supramolecular architectures [ 8 ]. <...> To date, much research has been focused on controlling motifs of metal-organic complexes through coordination bonds. <...> The — interaction can be one of the most powerful noncovalent intermolecular interactions for directing supramolecular architectures [ 10, 11 ]. <...> Therefore, the design of versatile functional ligands capable of coordinating to a metal atom with providing the -conjugated system for organizing their complexes into an extended network through — interactions is quite desirable. <...> Molecular structure of (I) with atom numbering scheme. <...> Thermal ellipsoids are drawn at the 50 % probability level We report here the structural characterization of one such complex [Cu(C12H8N2)(NO3)2d (I) Fig. 1. <...> The spectrum shows two strong bands at 1384 cm–1 and 1323 cm–1 attributable to (NO3)as and (NO3)s, respectively, which is in agreement with the coordinating nitrate anions [17— 19 ]. <...> The C—H stretching bands are observed at 3063 cm–1. <...> The peaks at 452 cm–1 and 508 cm–1 are due to Cu—N and Cu—O stretching vibrations. <...> The presence <...>