A polymeric complex of copper(II) bridged simultaneously by tridentate glycinato and mu(N,S)-thiocyanato anions. Synthesis, spectral, structural and thermal properties of the complex [Cu(Glycinato)(NCS)(H,O-2)](n)

The copper(II)-glycine-thiocyanate ion system, which has been studied, afforded a new 1:1:1 complex which crystallized with an additional water molecule. The IR spectrum of the solid complex suggests an aquo ligand, a bridging thiocyanato ligand and a N,O-bidentate chelating glycinato ligand. Room-temperature magnetic moment, electronic spectra and ESR spectra suggested a tetragonally distorted octahedral structure for the complex [Cu(glycinato)(NCS)(H2O)](n), which was confirmed by X-ray crystallography. The complex contains mu(N,S)-thiocyanato ligands and an aqua molecule. The glycinato anion chelates a copper atom via its N and O atoms. The second O atom of the glycinato group links another Cu atom at a long distance of 2.908(5) Angstrom, giving rise to N,O,O-tridentate chelating bridging glycinato ligand. The structure of the complex is further consolidated by hydrogen bonds of the type O-H ... O between aqua molecules and carboxylate O atoms. The thermal decomposition of the complex was investigated under nitrogen. Copyright (C) 1996 Elsevier Science Ltd