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Synthesis, physical and electrochemical characterization of mono- and heterobinuclear m-functionalized iron(III) Schiff base complexes

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Abstract

Mo(NO)T *p Cl2 (T *p  = 3,5-dimethyl pyrazole) when reacted with m-functionalized Fe(III) Schiff base complexes; the Schiff base ligands being derived from condensation of 2,4-dihydroxybenzaldehyde or salicylaldehyde with a variety of α,ω-diamines [1,2-C6H4(NH2)2, NH2(CH2) n NH2; n = 2–4] affords bimetallic complexes containing two potential reduction centers. The compounds were characterized by physicochemical and spectroscopic methods. It is shown that as the polymethylene carbon chain of the Schiff base backbone increases, the physicochemical and spectroscopic properties also change gradually. Electrochemical data show that the m-functionalized complexes reduce at potentials less cathodic than their p-substituted analogues. It is also shown that the redox potentials are solvent dependent.

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Acknowledgments

We acknowledge the support of the Departments of Physics and Chemistry, University of Nairobi, for assisting in the electrochemical and 1H NMR analyses, Department of Chemistry Jomo Kenyatta University of Agriculture and Technology for IR analysis, Pyrethrum Board of Kenya Laboratories for UV–Vis analysis, Sumika Chemical Analyzers, Japan, for C, H, N analysis and the School of Chemistry University of Sheffield for MS.

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Authors and Affiliations

  1. Department of Chemistry, University of Nairobi, P.O. Box 30197, Nairobi, 00100, Kenya

    Ruth A. Odhiambo

  2. Department of Chemistry, Kenyatta University, P.O. Box 43844, Nairobi, 00200, Kenya

    Gerald K. Muthakia

  3. Department of Chemistry, Chuka University College, P.O. Box 109, Chuka, 60400, Kenya

    Stanley M. Kagwanja

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  1. Ruth A. Odhiambo
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  2. Gerald K. Muthakia
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  3. Stanley M. Kagwanja
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Correspondence to Ruth A. Odhiambo.

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Odhiambo, R.A., Muthakia, G.K. & Kagwanja, S.M. Synthesis, physical and electrochemical characterization of mono- and heterobinuclear m-functionalized iron(III) Schiff base complexes. Transition Met Chem 37, 431–437 (2012). https://doi.org/10.1007/s11243-012-9606-3

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  • DOI: https://doi.org/10.1007/s11243-012-9606-3

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