Thermal, Elemental And Spectral Analysis Of Cu(Ⅱ) Complexes With Halogenosalicylates

摘要

The complexes Cu_2(3,5-Cl_2sal)_4.H_2O(Ⅰ), Cu(3,5-Br_2sal)_2.2H_2O(Ⅱ), Cu(3,5-rnI_2sal)_2.2H_2O(Ⅲ), and Cu(5-Isal)_2.2H_2O (Ⅳ), (where sal = salicylate) were synthesized. TG,rnDTG, DTA, IR, EPR and electronic spectra have been applied to investigate their thermal andrnspectral properties. The chemical composition of the complexes, the solid intermediates and thernresultant products of thermolysis have been identified by means of elemental analysis andrncomplexometric titration. Schemes of destruction of these complexes are suggested. Heating ofrnthese compounds first resulted in a release of water molecules. The thermal stability of theserncomplexes can be ordered in the sequence: Ⅳ = Ⅰ< Ⅱ < Ⅲ. The final product of the thermalrndecomposition was CuO in all cases. IR data suggested a unidentate coordination of carboxylatesrnto Cu(Ⅱ) in complexes Ⅰ-Ⅳ.