SYNTHESIS, CHARACTERIZATION AND THERMAL STUDIES OF MONONUCLEAR AND BINUCLEAR COMPLEXES OF COPPER(II) WITH SCHIFF-BASES DERIVED FROM 1-PHENYL-2,3-DIMETHYL-4-AMINO-5-PYRAZOLONE

A series of copper(II) complexes with ligands derived from the Schiff base reaction of 1-phenyl-2,3-dimethyl-4-amino-5-pyrazolone with 4-hyd roxysalicylaldehyde (L(1)H), 3-methoxysalicylaldehyde (L(2)H) and 2-hy droxynaphtaldehyde (L(3)H) have been prepared. These complexes have be en characterized by elemental analyses, magnetic susceptibility, infra red and electronic spectral data. Molar conductivities of the complexe s at room temperature were measured. The conductivity values of the L( 1)H and L(2)H complexes indicate weak electrolyte behaviour, whereas t he L(3)H complex is a non-electrolyte. The thermal decomposition of th e complexes has been studied by thermogravimetry and differential ther mal analyses. These studies show that each copper compound decomposes to the metal halide and finally the metal oxide.