Synthesis, Crystal Structure, Spectral and Thermal Studies of a New Organic-Inorganic Hybrid Cobalt(II) Complex of 2,2’-Bipyridine and Nitrate with Squarate

Abstract

The [Co(NO3)(bipy)2](sq)1/2 ・4H2O complex (I) (bipy: 2,2’-bipyridine, sq2−: 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 p̅1, with a = 7.6302(9), b = 12.0426(15), c = 14.2271(14) Å , α = 107.252(9)◦, β = 98.755(9), γ = 103.363(9)° 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 °C on heating in a static air atmosphere. The final decomposition product is CoO.