NEW COPPER(II) AZINO COMPLEXES

A new series of Cu(II) complexes of the type [Cu(L-1)(2)(H2O)(2)], [Cu (L-2)(2)(EtOH)(2)], [CU(L-3)(H2O)(2)](2)SO4 . 8H(2)O, [Cu(L-4)(H2O)(2) ]SO4 . 2H(2)O, and [Cu(L-5)(2)] . 5H(2)O (where HL1 = o-hydroxybenzala zino-alpha-ethylidenylcarboxylic acid, HL2 = methyl-o-hydroxybenzalazi no-alpha-ethylidenyl carboxylic acid, H2L3 = benzalazinoazino-alpha-et hylidenylcarboxylic acid, H2L4 = droxymethylbenzalazinoethylidenyl-alp ha-(o-benzoic acid) and H2L5 = o-hydroxybenzalazinoethylidenyl-alpha-( o-benzoic acid) have been synthesized and characterized by elemental a nd thermal analyses, conductance measurements and IR spectra. Electron ic spectra and magnetic susceptibility measurements of the solid compl exes indicate a distorted octahedral geometry around Cu2+ leading to a square-planar arrangement of the ligands.