Synthesis, characterization, spectroscopic, and thermal studies of imidazole complexes of metal benzenesulfonates. Crystal structure of [M(imH)(3)(H2O)(3)]center dot(BS)(2) [M=Ni(II) and Co(II)]

Yazicilar T. K., Gurkan E. Y., Ucar I., Kazak C.

TRANSITION METAL CHEMISTRY, vol.34, no.6, pp.669-676, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 6
  • Publication Date: 2009
  • Doi Number: 10.1007/s11243-009-9246-4
  • Journal Name: TRANSITION METAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.669-676
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Four novel transition metal benzenesulfonate (BS) complexes of imidazole (im) with a general formula [M(imH)(3)(H2O)(3)]center dot(BS)(2) [M=Mn(II) (1), Ni(II) (2), Co(II) (3)] and [Cu(BS)(imH)(3)]center dot(BS) (4) have been synthesized and characterized by physicochemical and spectroscopic methods. The complexes 2 and 3 have also been characterized by single X-ray diffraction technique. The BS anion in complexes 1-3 acts as a counter anion, while in complex 4, it acts as both ligand and counter anion. The Ni and Co complexes are isomorphous, crystallizing in the monoclinic crystal system with C2/c space group. Each metal(II) atom in 2 and 3 is octahedrally coordinated by three imidazole and three aqua ligands, adopting a mer-coordination mode with Ni(II) or Co(II) centers. In both 2 and 3, the H2C atom has bifurcated donor (O3 and O5) atoms, forming a bifurcated hydrogen bond. This hydrogen bond links the complex cation and BS anion, forming one-dimensional hydrogen-bonded supramolecular chains. The complexes exhibit different decomposition characteristics. Magnetic susceptibility measurement shows that complex 3 has orbital interactions.