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
1University of Engineering and Technology, Lahore, Pakistan
2Sargodha University, Sargodha, Pakistan
3University of Aberdeen, Aberdeen, Scotland
Keywords: synthesis, copper(II), 1,10-phenanthroline, m-aminobenzoate ion, coordination polymer
Abstract
A new copper(II) complex of 1,10-phenanthroline (C12H8N2) and the meta -aminobenzoate ion ( m -amb; ), having the formula Cu(C12H8N2)(C7H6NO2)Cl×0.5H2O, 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) Å) 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 p-p stacking interactions. Crystal data: C19H15ClCuN3O2.5, M r = 424.33, monoclinic, P 21/ n (No. 14), a = 9.8200(5), b = 10.9291(7), c = 16.3803(9) Å, b = 105.293(3)°, V = 1695.74(17) Å3, Z = 4, R ( F ) = 0.043, wR ( F 2) = 0.122.
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