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Thiocyanato-copper(II) complexes derived from a tridentate amine ligand and from alanine

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Abstract

Two thiocyanato-Cu(II) complexes including mononuclear dithiocyanato Cu(Me3dpt)(NCS)2 (1) and the polymeric 1D [Cu(d,l-Ala)(μN,S–NCS)(H2O)] n (2) were synthesized and structurally characterized (Me3dpt = bis(N-methyl-3-propyl)methylamine, Ala = alaninate anion). The IR spectrum of complex 1 confirmed the N-bonding coordination mode of the thiocyanate groups, and its visible spectrum revealed the square pyramidal geometry around the central Cu2+ ion. Single X-ray crystallography of 1 showed that the Cu(II) center displays square pyramidal geometry with severe distortion toward trigonal bipyramidal environment. Complex 2 forms a 1-D polymeric chain with the NCS− acting as a μN,S-ligand. A distorted SP geometry around the Cu2+ centers was achieved by the O and N atoms of alaninato anion, the aqua ligand and by the N and S atoms of the bridging thiocyanate groups. Hydrogen bonds of the type N–H···O, N–H···S and O–H···O are formed in this complex leading to the extension of the 1D chain to a supramolecular network.

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Fig. 2

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Notes

  1. Ligand abbreviations: Me3dpt, bis(N-methyl-3-propyl)methylamine; Medpt, bis(3-aminopropyl)- methylamine; Mepea, N-(2-pyridylmethyl)-N-[2-(2-pyridylethyl)]methylamine; TPA, tris(2-pyridyl-methyl)amine; Me3tren, tris(N-methyl-2-aminoethyl)amine; Me6tren, tris(N,N-dimethyl-2-aminoethyl)-amine; Me6trien, 1,1,4,7,10,10-hexamethyltriethylenetetraamine; pmap, bis[2-(2-pyridylethyl)]-(2-pyridylmethyl)amine; pmea, bis(2-pyridylmethyl)-2-(2-pyridylethyl)amine; tepa, tris[2-ethyl-(2-pyridyl)]-amine; Et3dien,N,N′,N″-triethyldiethylenetriamine; Et2dien, N,N-diethyldiethylenetriamine; Me5dien, N,N,N′,N″,N″-pentamethyldiethylenetriamine; EtMe4dien, N′-ethyl-N,N,N″,N″-tetramethyldiethylene- triamine; pdpa, N-(2-aminopropyl)-N,N-bis(2-pyridylmethyl)amine; pzdepy, N,N′-bis[2-(2-pyridylethyl)]-piperazine; Ala, alaninate ion; Gly, glycinate ion.

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Acknowledgments

This research was financially supported by the Department of Chemistry—University of Louisiana at Lafayette. S.S.M. thanks Dean B. Clark (UL Lafayette). FAM thanks Dr. J. Baumgartner (TU-Graz) for assistance.

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Authors and Affiliations

  1. Institut für Physikalische and Theoretische Chemie, Technische Universität Graz, 8010, Graz, Austria

    Franz A. Mautner

  2. Department of Chemistry, University of Louisiana at Lafayette, P.O. Box 44370, Lafayette, LA, 70504, USA

    Febee R. Louka, August A. Gallo & Salah S. Massoud

  3. Institut für Chemische Technologie von Materialien, Technische Universität Graz, Stremayrgasse 16, 8010, Graz, Austria

    Jörg H. Albering

  4. Department of Chemistry, Faculty of Science, Fayoum University, Fayoum, Egypt

    Mohamed R. Saber & Nagua B. Burham

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  1. Franz A. Mautner
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  2. Febee R. Louka
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  3. August A. Gallo
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  4. Jörg H. Albering
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Correspondence to Franz A. Mautner or Salah S. Massoud.

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Mautner, F.A., Louka, F.R., Gallo, A.A. et al. Thiocyanato-copper(II) complexes derived from a tridentate amine ligand and from alanine. Transition Met Chem 35, 613–619 (2010). https://doi.org/10.1007/s11243-010-9371-0

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