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Preparation and physico-chemical characterisation of iron(III) complexes containing substituted benzimidazole and Schiff base moieties

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Abstract

New complexes of iron(III) of the type [(μ-Cl)2Fe2{η 2-(opbz)4] (1) and [(Cl)2Fe{η 2-(opbz)] (2) [Hopbz = {2-(o-hydroxyphenyl)}-benzimidazole, η 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(OPri), aryloxo-Na(OAr) and tetraisopropoxyaluminate [Na{Al(OPri)4] in a 1:1 molar ratio (in THF–benzene medium) to produce derivatives of the type: {(η 2-(sb) Fe{η 2-opbz)2] (3), (4) and (5), [(μ-OPri)2Fe2{η-(opbz)4}] (6) [(μ-OAr)2Fe2{η-(opbz)4}] (7) and [(μ-OPri)2Al(OPri)2-Fe{η-(opbz)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.

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Authors and Affiliations

  1. Department of Chemistry, Synthetic Inorganic and Metallo-Organic Research Laboratory, University of Allahabad, Allahabad, 211002, India

    Raj K. Dubey & Uma K. Dubey

  2. Department of Chemistry, R.J. College, Mumbai, 40068, India

    Chandrakant M. Mishra

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  1. Raj K. Dubey
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  2. Uma K. Dubey
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  3. Chandrakant M. Mishra
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Dubey, R.K., Dubey, U.K. & Mishra, C.M. Preparation and physico-chemical characterisation of iron(III) complexes containing substituted benzimidazole and Schiff base moieties. Transition Met Chem 31, 849–855 (2006). https://doi.org/10.1007/s11243-006-0068-3

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