SYNTHESIS, CRYSTAL STRUCTURE AND SPECTRAL PROPERTIES OF COPPER(II) AND COBALT(II) 3-METHYLTHIOPHENE-2- CARBOXYLATO COMPLEXES WITH FUROPYRIDINES

Open access

Abstract

The synthesis and characterization of eleven new Cu(II) and Co(II) complexes is reported. The complexes were characterized by elemental analyses, infrared and electronic spectra. Copper(II) with 3- methylthiophene-2-carboxylic acid (HMTK) forms a dinuclear complex of the acetate type [Cu2(MTK)4(H2O)2]. By reaction of this complex with 2-metylfuro[3,2-c]pyridine (MeFP), not only acetate type complexes [Cu2(MTK)4L2] (L= FP, MeFP) were obtained, but also monomeric complex [Cu(MTK)2(FP)2]. In the cases of [1]benzofuro[3,2-c]pyridine (BFP) and 2-(3-trifluoromethylphenyl) furo[3,2-c]pyridine (CF3FP) only monomeric complexes [Cu(MTK)2L2] (L = BFP, CF3FP) were obtained. It is possible to observe, that with increasing amount of the ligand, the yield of monomeric complexes increases too. In monomeric complexes, the carboxylic group of anionic MTK binds to atom Cu(II) by asymmetrically chelating O,O-coordination. The crystal structure of the complex [Cu(MTK)2(MeFP)2] was determined by X-ray single crystal structure analysis. The copper(II) atom lies in the crystallographic centre of symmetry in an distorted tetragonal-bipyramidal arrangement. The structure of this complex confirms an asymmetric chelate coordination of the carboxylic group. HMTK and Cobalt(II) form coordination compound [Co(H2O)6](MTK)2 with assumed ionic mode of coordination of anionic MTK. With furopyridines monomeric complexes [Co(MTK)2L2] (L= FP, MeFP, BFP, CF3FP) with distorted octahedral coordination polyhedron around Co(II), were formed.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • ELOY F. DERYCKERE A.: Sur la synthése des furo[32-c]pyridines. J. Heterocycl. Chem. 8 1971 57-60.

  • G. M. SHELDRICK: SHELXS-86 Oxford University Press Oxford 1985 175.

  • G. M. SHELDRICK: SHELXL-97 University of Göttingen Germany 1997.

  • JAŠKOVÁ J. MIKLOŠ D. KORABIK M. JORÍK V. SEGĽA P. KALIŇÁKOVÁ B. HUDECOVÁ D. ŠVOREC J. FISCHER A. MROZINSKY J. LIS T. MELNÍK M.: Synthesis spectral and magnetic properties and crystal structures of copper(II) pyridinecarboxylates as potential antimicrobial agents. Inorg. Chim. Acta 360 2007 2711-2720.

  • KATO M. MUTO Y.: Factors affecting the magnetic properties of dimeric copper(II) complexes. Coord. Chem. Rev. 92 1988 45-83.

  • LEVER AB.P.: Inorganic Electronic Spectroscopy 2nd ed. Elsevier Amsterdam 1984 p. 480.

  • NAKAMOTO K.: Infrared and Raman Spectra of Inorg. and Coord. Compounds Part B 5th Edition New York 1997 384-387.

  • PANAGOULIS D. PONTIKI E. SKEVA E. RAPTOPOULOU C. GIROUSI S. HADJIPAVLOU-LITINA D. DENDRINOU-SAMARA C.: Synthesis and pharmacochemical study of new Cu(II) complexes with thiophen-2-yl and αβ- unsaturated substituted carboxylic acids. J. Inorg. Biochem. 101 2007 623-634.

  • RIBEIRO da SILVA M. A. V. SANTOS A. F. L. O. M.: Thermochemical properties of three 2-thiophene carboxylic acid derivatives. J. Chem. Therm. 40 2008 1451-1457.

  • SIEMENS XEMP. Version 4.2 Analytical X-ray Instruments Inc. Madison Wisconsin USA (1990).

  • ZHANG X.L. NG S. W.: Hexaaquacobalt(II) bis(6-hydroxypyridine-3-carboxylate).Acta Cryst. E61 2005 m1140-m1141

Search
Journal information
Impact Factor


CiteScore 2018: 0.68

SCImago Journal Rank (SJR) 2018: 0.173
Source Normalized Impact per Paper (SNIP) 2018: 0.288


Metrics
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 232 76 8
PDF Downloads 87 46 8