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Synthesis and characterization of transition metal complexes of N′-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene]thiophene-2-carbohydrazide

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Abstract

A hydrazone ligand (HL) containing the thiophene moiety has been prepared via condensation of thiophene-2-carbohydrazide with 1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carbaldehyde. The complexes of copper(II), nickel(II), cobalt(II), manganese(II), zinc(II), palladium(II), iron(III), ruthenium(III), uranyl(VI), and titanium(IV) with the ligand were prepared in good yield from the reaction of the ligand with the corresponding metal salts. The ligand and complexes were characterized using infrared, mass spectra, nuclear magnetic resonance, electronic absorption spectra, electron spin resonance, and magnetic moment measurements as well as elemental and thermal analyses. The results showed that the complexes are enolic by nature, whilst the ratio between the metal ion and the ligand depends on the acidity of the metallic ions and their oxidation numbers.

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Authors and Affiliations

  1. Inorganic Chemistry Department, National Research Center, P.O. Box 12622, Dokki, Cairo, Egypt

    M. F. R. Fouda, M. M. Abd-Elzaher & M. M. E. Shakdofa

  2. Department of Chemistry, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt

    F. A. El Saied, M. I. Ayad & A. S. El Tabl

Authors
  1. M. F. R. Fouda
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  2. M. M. Abd-Elzaher
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  3. M. M. E. Shakdofa
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  4. F. A. El Saied
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  5. M. I. Ayad
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  6. A. S. El Tabl
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Correspondence to M. F. R. Fouda.

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Fouda, M.F.R., Abd-Elzaher, M.M., Shakdofa, M.M.E. et al. Synthesis and characterization of transition metal complexes of N′-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methylene]thiophene-2-carbohydrazide. Transition Met Chem 33, 219–228 (2008). https://doi.org/10.1007/s11243-007-9024-0

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  • DOI: https://doi.org/10.1007/s11243-007-9024-0

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