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Synthesis, crystal structures, spectroscopic studies and antibacterial properties of a series of mononuclear cobalt(III) Schiff base complexes

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Abstract

New complexes of cobalt(III) with the tridentate and tetradentate Schiff base ligands: 3-methoxy-2-{(Z)[(2-hydroxyphenyl)imino]methyl}phenol (H2L1), 4-[(2-hydroxyphenyl)imino]-2-pentanone (H2L2); and 2-((E)-1-(2-((E)-1-(2-hydroxy-4,5-dimethylphenyl)ethylideneamino)ethylimino)ethyl)-4,5 dimethylphenol (H2L3), namely [CoIII(L1)(N-MeIm)3]PF6 (1), [CoIII(L1)(py)3]ClO4 (2), [Co(L1)(py)3][Co(L1)2] (3) and [CoIII(L2)(N-MeIm)3]PF6 (4) and [Co(L3)(N-MeIm)2]PF6 (5), were synthesized and characterized by physico-chemical and spectroscopic methods. The crystal structures of the complexes were determined by X-ray crystallography. In each of these complexes, the cobalt(III) centre has a slightly distorted octahedral environment, utilizing all available coordination centres of the ligands. The complexes were also screened for in vitro antibacterial activities against four human pathogenic bacteria, and their minimum inhibitory concentrations indicated good antibacterial activities.

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Acknowledgments

We thank Semnan University for supporting this study.

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Authors and Affiliations

  1. Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614, Poznan, Poland

    Maciej Kubicki, Grzegorz Dutkiewicz & Mikołaj Pyziak

  2. Department of Chemistry, College of Science, Semnan University, Semnan, Iran

    Maryam Hasanzadeh & Mehdi Salehi

  3. Department of Organic Chemistry, Kharazmi University, Tehran, Iran

    Seyyed Mohammad Shahcheragh

  4. Department of Biochemistry, Semnan University of Medical Science, Semnan, Iran

    Ali Khaleghian

Authors
  1. Maryam Hasanzadeh
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  2. Mehdi Salehi
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  3. Maciej Kubicki
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  4. Seyyed Mohammad Shahcheragh
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  5. Grzegorz Dutkiewicz
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  6. Mikołaj Pyziak
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  7. Ali Khaleghian
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Correspondence to Mehdi Salehi.

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Hasanzadeh, M., Salehi, M., Kubicki, M. et al. Synthesis, crystal structures, spectroscopic studies and antibacterial properties of a series of mononuclear cobalt(III) Schiff base complexes. Transition Met Chem 39, 623–632 (2014). https://doi.org/10.1007/s11243-014-9841-x

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  • DOI: https://doi.org/10.1007/s11243-014-9841-x

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