Hydrothermal synthesis and structural studies of two new copper(II) coordination polymers with V-shape ligands

Two new coordination polymers, [Cu-2(oba)(2)(bPY)(2.5)](n)(.)2nH(2)O (1) and [Cu(bpndc)(bpy)(0.5)](n) (2) (H(2)oba=4,4-oxybis(benzoic acid); H(2)bpndc=benzophenone-4,4'-dicarboxylic acid; bpy = 4,4'-bipyridine) were synthesized by the hydrothermal reactions and characterized by single crystal X-ray diffraction, elemental analysis and IR spectrum. In 1, oba(2-) anions adopt tridentate and bidentate mode, linking Cu(II) ions into I D helical chains, and bpy ligands link Cu(II) ions into I D chains too. These two kinds of chains are interconnected in the Cu(II) nodes, forming a complicated 3D network. In 2, bpndc(2-) anions adopt tetradentate mode, linking Cu(II) ions into 2D layers. These layers are connected by bpy ligands into a 3D network with small ID channels. (c) 2005 Elsevier B.V. All rights reserved.