The synthesis and structure of the NiII complex of 1,10-phenanthroline-2,9-dicarboxylate: a three-dimensional network via hydrogen bonding interactions

A new NiII complex, [Ni(L)(H2O)3]$H2O (LZ1,10-phenanthroline-2,9-dicarboxylate), has been synthesized and structurally determined by X-ray diffraction analysis. The complex crystallizes in monoclinic system, space group P2(1)/c, aZ9.667(4), bZ21.929(9), cZ7.262(3) A ° , bZ95.395(7)8 and ZZ4. In this complex, each metal center adopts an octahedral geometry formed by two N atoms of a ligand L and four O atoms from three H2O molecules and a carboxyl of the ligand. Each ligand adopts N,N,O-tridentate coordination mode with two N atoms and an O atom chelating a NiII center to form a mononuclear molecule. Intermolecular strong O–H/O and weak C–H/O hydrogen bonds extend the mononuclear structure into a three-dimensional supramolecular architecture. q 2005 Elsevier B.V. All rights reserved.