Synthesis, characterization and crystal structure of a novel coordination compound based on the mixed N- and O-donor ligands exhibiting the metal ion-bridged ligand-ligand interaction:: [Zn(2,2′-bipy)(Phmal)(H2O)]•2H2O

The novel ternary zinc(II) coordination compound of formula [Zn(2,2'-bipy)(Phmal)(H2O)].2H(2)O (Phmal = phenylmalonate, 2,2'-bipy 2,2'-bipyridine) has been synthesized and characterized by FT-IR spectroscopy, thermogravimetric analysis (TG), UV-Vis spectra. X-ray crystallographic studies of the complex reveal that the zinc atom has a distorted square-pyramidal geometry being coordinated by two nitrogen atoms of 2,2'-bipy, two oxygen atoms from the phenylmalonate ligand and one water. It is very interesting in this structure that the complex involves a metal ion bridged ligand-ligand aromatic ring intramolecular pi-pi stacking interaction. An extended two-dimensional supramolecular network exhibiting the (6, 3) pattern was assembled through hydrogen bonding. (c) 2005 Elsevier B.V. All rights reserved.