2016. 57, 5 – UDC 548.73:547.13:546.56 STRUCTURAL CHARACTERIZATION OF A MIXED-LIGAND COMPLEX OF COPPER(II) WITH 1,10-PHENANTHROLINE AND THE m-AMINOBENZOATE ION S.S. Batool1, S.R. Gilani1, M.N. Tahir2, W.T.A. Harrison3 1Department of Chemistry, University of Engineering and Technology, Lahore, Pakistan E-mail: s_r_gilani@gmail.com 2Department of Physics, Sargodha University, Sargodha, Pakistan 3Department of Chemistry, University of Aberdeen, Aberdeen, Scotland Received January, 19, 2015 Revised — March, 18, 2015 A new copper(II) complex of 1,10-phenanthroline (C12H8N2) and the meta-aminobenzoate ion (m-amb; 76 2CH NO ), having the formula Cu(C12H8N2)(C7H6NO2)Cl0.5H2O, is prepared and characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction. <...> The structure is built up from monomeric units in which the coordination environment around the metal ion is a square plane arising from a bidentate 1,10-phenanthroline molecule, a monodentate m-amb anion, and a chloride ion. <...> A very long (Cu—N = 2.856(5) Е) bond to the nitrogen atom of an adjacent m-amb ion generates [101] polymeric chains in the crystal. <...> The crystal structure is consolidated by N—H O and O—H O hydrogen bonds and C—H O, C—H Cl, and aromatic — stacking interactions. <...> The synthesis of copper(II) complexes of phenanthroline and carboxylates and the study of their function as SOD-biomimetics is a focal point in the field of bioinorganic chemistry [ 2—5]. <...> Copper(II) phenanthroline/carboxylato complexes possess a wide range of pharmacological applications due to their antiviral [ 6 ], antimicrobial [ 7—9], antimycobacterial [ 10, 11 ], anti-inflammatory, and anticandida [ 12 ] activities. <...> Their relatively low molecular weights make their use attractive as drugs [ 13 ]. © Batool S.S., Gilani S.R., Tahir M.N., Harrison W.T.A., 2016 . 1041 – 1046 1042 S.S. BATOOL, S.R. GILANI, M.N. TAHIR, W.T.A. HARRISON Mixed-ligand complexes of copper(II) with diamines and carboxylates exhibit great structural diversity and coordination versatility, owing to the variable ligation of the carboxylate moiety. <...> Copper(II) carboxylates exhibit monodentate [ 6, 14 ] and bidentate [ 15, 16 ], coordination modes resulting in supramolecular metal-organic frameworks. <...> Aromatic — stacking <...>