Synthesis, thermal behavior, and other properties of Y(III) and La(III) complexes with 4,4′-bipyridine and trichloro- or dibromoacetates

New Y(III) and La(III) complexes with 4-bpy (4,4'-bipyridine) and trichloro- or dibromoacetates with the formulae: Y(4-bpy)(2)(CCl3COO)(3)center dot H2O I, La(4-bpy)(1.5)(CCl3COO)(3)center dot 2H(2)O II, Y(4-bpy)(1.5)(CHBr2COO)(3)center dot 3H(2)O III, and La(4-bpy)(CHBr2COO)(3)center dot H2O IV were prepared and characterized by chemical, elemental analysis, and IR spectroscopy. Conductivity studies (in methanol, dimethyloformamide, and dimethylsulfoxide) were also described. They are small, crystalline substances. The way of metal-ligand coordination was discussed. The thermal properties of complexes in the solid state were studied by TG-DTG techniques under dynamic flowing air atmosphere. TG-FTIR system was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis in dynamic flowing argon atmosphere for La(III) compounds.