SYNTHESES AND CHARACTERIZATIONS OF THE CYANIDE-BRIDGED HETERONUCLEAR POLYMERIC COMPLEXES WITH 2-ETHYLIMIDAZOLE

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Karaagac D., KÜRKÇÜOĞLU G. S.

BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA, vol.30, no.2, pp.263-272, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 2
  • Publication Date: 2016
  • Doi Number: 10.4314/bcse.v30i2.10
  • Journal Name: BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.263-272
  • Keywords: Tetracyanonickelate(II) complex, 2-Ethylimidazole complex, Cyanide-bridged complex, Vibration spectra, Thermal analysis, CRYSTAL-STRUCTURES, THERMAL ANALYSES, CD(II), ZN(II), NI
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Three new cyano-bridged heteronuclear polymeric complexes, [Cu(etim)(3)Ni(CN)(4)](n), {[Zn(etim)(3)Ni(CN)(4)]center dot H2O}(n) and [Cd(etim)(2)Ni(CN)(4)](n) (etim = 2-ethylimidazole, hereafter abbreviated as Cu-Ni-etim, Zn-Ni-etim and Cd-Ni-etim) have been prepared in powder form and characterized by FT-IR and Raman spectroscopies, thermal (TG, DTG and DTA) and elemental analyses. The spectral features of the complexes suggest that the Ni(II) ion is four coordinate with four cyanide-carbon atoms in a square planar geometry, whereas the Cu(II) and the Zn(II) ions of the Cu-Ni-etim and the Zn-Ni-etim complexes are completed by nitrogen atoms of two cyano groups of [Ni(CN)(4)](2-) coordinated to the adjacent M(II) ions and three nitrogen atoms of the etim ligands. The Cd(II) ion of the Cd-Ni-etim complex is six-coordinate, completed with the two nitrogen atoms of the etim ligands and the four nitrogen atoms from bridging cyano groups. Polymeric structures of the Cu-Ni-etim and the Zn-Ni-etim complexes are 1D coordination polymer, while complex the Cd-Ni-etim presents a 2D network. The thermal decompositions in the temperature range 30-700 degrees C of the complexes were investigated in the static air atmosphere.