Reaction of Some Schiff Base Complexes of Iron(III) with Nitrogen and Sulfur Donor Anions

Reactions of some Schiff bases with Fe(III) salts in the presence of nitrogen or sulfur donor anions have been investigated. The Schiff bases are derived from the reaction of salicylaldehyde, substituted salicyaldehyde or 2-hydroxy-1 -naphthaldehyde with 8-aminoquinoline, substituted aniline, ethylenediamine or o-phenylenediamine. The obtained Schiff bases act either as tridentate or tetradentate dibasic ligands. Tentative structures have been assigned on the basis of elemental analyses, conductivity, spectral and magnetic data. Most of the obtained complexes are proposed to be hexa-coordinate but some might be penta-coordinate. The added anions (thiocynate, 8-aminoquinolate, pyrrolidinedithiocarbamate or piperazinedi(dithiocarbamate) are bonded to iron, in addition to the Schiff base, producing mononuclear complexes or act as bridging groups producing dinuclear or polynuclear complexes.