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Abstract
New complexes of iron(III) of the type [(μ-Cl)^sub 2^Fe^sub 2^{η ^sup 2^-(opbz)^sub 4^] (1) and [(Cl)^sub 2^Fe{η ^sup 2^-(opbz)] (2) [Hopbz = {2-(o-hydroxyphenyl)}-benzimidazole, η ^sup 2^ = Number of connectivity sites involved in bonding the metal] have been synthesized by the interactions of iron(III) chloride with the corresponding ligand (Hopbz) in 1:2 and 1:1 molar ratio(s) in hot EtOH. The complex (1) was further treated with various sodium salts of Schiff bases (sb) [Na(o-smab), Na(p-smab) and Na(sap)], alkoxo-Na(OPr^sup i^), aryloxo-Na(OAr) and tetraisopropoxyaluminate [Na{Al(OPr^sup i^)^sub 4^] in a 1:1 molar ratio (in THF-benzene medium) to produce derivatives of the type: {(η ^sup 2^-(sb) Fe{η ^sup 2^-opbz)^sub 2^] (3), (4) and (5), [(μ-OPr^sup i^)^sub 2^Fe^sub 2^{η-(opbz)^sub 4^}] (6) [(μ-OAr)^sub 2^Fe^sub 2^{η-(opbz)^sub 4^}] (7) and [(μ-OPr^sup i^)^sub 2^Al(OPr^sup i^)^sub 2^-Fe{η-(opbz)^sub 2^}] (8). All these derivatives were characterised by elemental analysis, spectral (IR, UV-visible and FAB-mass) and magnetic susceptibility measurements. On the basis of these studies, a distorted octahedral (dimeric) geometry around iron(III) for the complexes (1), (6), (7) and (8) have been suggested.[PUBLICATION ABSTRACT]