SYNTHESIS AND CHARACTERIZATION OF OXOTITANIUM(IV) AND OXOVANADIUM(IV)COMPLEXES OF IS(5-HYDROXY-3-METHYL-1-PHENYL-4-PYRAZOLYL)METHANE LIGANDS

The interactions of oxotitanium(IV) and oxovanadium(It? with ligands c ontaining enolic oxygen donors, such as arylbis(5-hydroxy-3 -methyl-1- phenyl-4-pyrazolyl) methanes(ArBPyM), have been studied by means of IR spectra, thermogrivimetric measurements, elemental analysis and condu ctometric titrations. The results indicate the probable formation of d imeric complexes (metal: ligand ratio = 1:1) through the sulfato group which acts as a bridging bidentate ligand. Application of differentia l - thermal analysis allowed the determination of the mechanism of the rmal decomposition of the complexes.'