Synthesis, crystal structure, spectral and thermal studies of a new organic-inorganic hybrid cobalt(II) complex of 2,2 '-bipyridine and nitrate with squarate

YEŞİLEL O. Z., Pasaoglu H., Kastas G., Oelmez H., Bueyuekguengoer O.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol.61, no.10, pp.1249-1253, 2006 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 10
  • Publication Date: 2006
  • Doi Number: 10.1515/znb-2006-1011
  • Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1249-1253
  • Keywords: squarate, 2,2 '-bipyridine, thermal decomposition, MAGNETIC-PROPERTIES, (ZN2+C4O4.2H2O)3.CH3COOH.H2O, ANIONS, ACID, CO
  • Ondokuz Mayıs University Affiliated: No

Abstract

The [Co(NO3)(bipy)(2)](sq)(1/2)center dot 4H(2)O complex (1) (bipy: 2,2'-bipyridine, sq(2-): squarate) has been prepared and characterized by elemental analysis, IR, UV/vis spectra, thermal analysis, and single crystal X-ray diffraction. The title compound crystallizes in the triclinic system, space group P!, with a = 7.6302(9), b = 12.0426(15), c = 14.2271(14) angstrom, alpha = 107.252(9)degrees, beta = 98.755(9)degrees, gamma = 103.363(9)degrees and Z = 2. The Co(II) ion in its octahedral complex is chelated by the nitrogen atoms of the two 2,2'-bipyridine, and by two oxygen atoms of the nitrato group. The anionic squarate behaves as a counter ion. Thermal analysis has shown that the title compound decomposes in three stages over the range 20-1000 degrees C on heating in a static air atmosphere. The final decomposition product is CoO.