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Synthesis and Structural Characterization of the Mononuclear Cobalt(II) Complex: {5,5′-Dihydroxy-2,2′-[o-phenylene-bis(nitrilomethylene)]diphenolato}cobalt(II) Dihydrate

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Abstract

The Schiff base ligand H2L·C2H5OH derived from the condensation reaction between o-phenylenediamine and 2,4-dihydroxybenzaldehyde as well as its mononuclear complex [CoL]·2H2O have been synthesized and characterized by X-ray crystallography, IR, 1H NMR and UV–Vis analyses, and density functional theory (DFT B3LYP) calculations. The CoII ion has a slightly distorted square-planar coordination provided by tetradentate dianionic N2O2 ligand L2−. The spin state of the complex was determined as being S = 1/2. On the basis of DFT calculations, the UV–Vis absorption bands of the ligand can be assigned to the 1A1 → 1B2 (two) and 1A1 → 1A1 transitions, while for complex they correspond to the 2A2 → 2B1 (two) and 2A2 → 2A2 ones.

Graphical Abstract

Index Abstract The Schiff base ligand H2L·C2H5OH derived from the condensation reaction between o-phenylenediamine and 2,4-dihydroxybenzaldehyde as well as its mononuclear complex [CoL]·2H2O have been synthesized and characterized by X-ray crystallography, IR, 1H NMR and UV–Vis analyses, and density functional theory (DFT B3LYP) calculations.

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Acknowledgments

This research was financially supported by European Regional Development Fund, Sectoral Operational Programme “Increase of Economic Competitiveness”, Priority Axis 2 (SOP IEC-A2-O2.1.2-2009-2, ID 570, COD SMIS-CSNR: 12473, Contract 129/2010-POLISILMET).

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487, Iasi, Romania

    Alina Soroceanu, Sergiu Shova, Maria Cazacu & Constantin Turta

  2. Institute of Applied Physics of ASM, Academiei Str. 5, 2028, Chisinau, Republic of Moldova

    Sergiu Shova

  3. Institute of Chemistry of ASM, Academiei Str. 3, 2028, Chisinau, Republic of Moldova

    Iolanta Balan, Natalia Gorinchoy & Constantin Turta

Authors
  1. Alina Soroceanu
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  2. Sergiu Shova
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  3. Maria Cazacu
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  4. Iolanta Balan
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  5. Natalia Gorinchoy
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  6. Constantin Turta
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Corresponding author

Correspondence to Maria Cazacu.

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Soroceanu, A., Shova, S., Cazacu, M. et al. Synthesis and Structural Characterization of the Mononuclear Cobalt(II) Complex: {5,5′-Dihydroxy-2,2′-[o-phenylene-bis(nitrilomethylene)]diphenolato}cobalt(II) Dihydrate. J Chem Crystallogr 43, 310–318 (2013). https://doi.org/10.1007/s10870-013-0422-1

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  • DOI: https://doi.org/10.1007/s10870-013-0422-1

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