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 wa ter molecule. The IR spectrum of the solid complex suggests an aquo li gand, a bridging thiocyanato ligand and a N,O-bidentate chelating glyc inato ligand. Room-temperature magnetic moment, electronic spectra and ESR spectra suggested a tetragonally distorted octahedral structure f or 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 i ts N and O atoms. The second O atom of the glycinato group links anoth er 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 th e complex is further consolidated by hydrogen bonds of the type O-H .. . O between aqua molecules and carboxylate O atoms. The thermal decomp osition of the complex was investigated under nitrogen. Copyright (C) 1996 Elsevier Science Ltd