MONONUCLEAR AND BINUCLEAR COMPLEXES OF IRON(III) WITH THE TETRADENTATE SCHIFF-BASE DERIVED FROM SALICYLALDEHYDE AND 1,2-DIAMINOPROPANE

The complexes of type [Fe(salpn)L]ClO4 [L = bpy (2,2'-bipyridyl) or ph en (o-phenanthroline), H(2)salpn = N,N'-bis(salicylidene)propylenediam ine] and type [(Fe (salpn))(2)L] (L = terephthalate or fumarate dianio n) have been prepared and studied by elemental analyses, IR and electr onic spectroscopies and magnetochemical measurements. An octahedral ar rangement of iron(III) (S = 5/2) is proposed. The complexes with dicar boxylic acids are probably binuclear and magnetically diluted at room temperature. The compounds with bpy or phen are probably mononuclear. Regarding their anomalous mu(eff) values (5.52 or 4.25 B.M.), the temp erature dependence of magnetic susceptibility was measured, but antife rromagnetic exchange interaction or spin equilibrium were not found.