PHYSICOCHEMICAL PROPERTIES OF CU(II) COMPLEXES OF BIS-SALICYLIDENE-1,2-PHENYLENEDIAMINE AND IS-(3,5-DICHLOROSALICYLIDENE)-1,2-PHENYLENEDIAMINE

The powder samples of Cu(II) complexes of bis-salicylidene-1,2-phenyla nediamine (complex I) and is-(3,5-dichlorosalicylidene)-1,2-phenylened iamine (complex II) have been prepared and investigated by magnetic, I R, UV/VIS and EPR methods. From IR similar chemical structures for bot h complexes have been proposed. The electronic spectra support the squ are-planar geometry of both complexes. Magnetic susceptibility of comp lex I has shown typical paramagnetic behaviour for spin S = 1/2 with s ome ferromagnetic interaction, but no ferromagnetic order down to 1.7 K. The observed EPR spectra for both complexes are dominated by resona nces arising from coupled pairs of copper ions in the temperature rang e investigated.