Synthesis, structure, thermal decomposition and spectral properties of neutral [Fe(bpta)2(etOH)2(NCS)2]
Zuzana Lukačovičová *, Róbert Uhrecký, Ján Moncoľ, Darina Lacková, Iveta Ondrejkovičová, Marian Koman, Zuzana Mičicová a, Zuzana Harmatová b
Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology, Radlinského 9, SK – 812 37 Bratislava, Slovakia
a Faculty of Industrial Technologies in Púchov, University of Alexander Dubček in Trenčín, I. Krasku 491/30, 020 01 Púchov, Slovakia
b Faculty of Industrial Technologies in Púchov, University of Alexander Dubček in Trenčín, I. Krasku 491/30, 020 01 Púchov, Slovakia
E-mail: * xfaberovaz@stuba.sk
Abstract: The new iron(II) complex [Fe(bpta)2(EtOH)2(NCS)2] (bpta = 3,3'-(1,2,4-thiadiazole-3,5-diyl)dipyridine; EtOH = ethanol) has been prepared by refluxing Fe(NCS)3 or Fe(NCS)2 with thionicotinamide in an ethanol solution and characterized by elemental analysis, infrared spectroscopy, thermal decomposition and X-ray structural analysis. The characterized compound is a mixture of three regioisomers resulting from differential coordination by the 3- and 5-position 2-pyridyl groups. The bpta ligand was generated in situ by the oxidation dimerization of thionicotinamide. X-ray single-crystal diffraction revealed that the crystal structure is centrosymmetric and the complex crystallizes in the triclinic space group P-1. The iron(II) atom lies in the centre of symmetry and it is octahedrally coordinated by two nitrogen atoms from two thiocyanate anions and two oxygen atoms from ethanol molecules in the equatorial plane and two nitrogen atoms of pyridine rings from two bpta ligands in the axial positions. This complex represents the second example of metal complex with bpta.
Keywords: 3,3'-(1,2,4-Thiadiazole-3,5-diyl)dipyridine — Thiocyanate complex — Iron(II) complex — Crystal structure
Full paper in Portable Document Format: acs_0212.pdf
Acta Chimica Slovaca, Vol. 8, No. 1, 2015, pp. 78—85, DOI: 10.1515/acs-2015-0014