Structural characterization of a mixed-ligand complex of copper(II) with 1,10-phenanthroline and the m-aminobenzoate ion.

A new copper(II) complex of 1,10-phenanthroline (C1HN) and the meta-aminobenzoate ion ( m-amb; CHNO), having the formula Cu(CHN)(CHNO)Cl∙0.5HO, 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 π-π stacking interactions. Crystal data: CHClCuNO, M = 424.33, monoclinic, P2/ n (No. 14), a = 9.8200(5) Å, b = 10.9291(7) Å, c = 16.3803(9) Å, β = 105.293(3)°, V = 1695.74(17) Å, Z = 4, R( F) = 0.043, wR( F ) = 0.122. [ABSTRACT FROM AUTHOR]