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Co(II) and Cu(II) Schiff base complexes of bis(N-(4-diethylamino-2-methylphenyl)-3,5-di-tert-butylsalicylaldimine): Electrochemical and X-ray structural study

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Abstract

Copper(II) and cobalt(II) complexes of salicylaldimine obtained by the condensation of N,N-diethyl-2-methyl-1,4-phenylenediamine with 3,5-di-tert-butyl-2-hydroxybenzaldehyde have been synthesized and characterized by elemental analyses, magnetic susceptibility measurements, cyclic voltammetry, and FT-IR and UV–Vis spectroscopy. The molecular structure of the title copper(II) complex was determined by the single crystal X-ray diffraction technique. The Cu(II) center is coordinated by four atoms of the donor set in a compressed tetrahedral trans-[N2O2] environment, which can be essentially ascribed to the presence of bulky fragments of the ligand. The computed bond valences of the copper verify +2 oxidation state and indicate that the copper bonds, in particular Cu–N bonds, are elongated due to steric effects from bulky substituents in the ligands, N-(4-diethylamino-2-methylphenyl). Intermolecular C–H···π interactions leading to centrosymmetric synthons serve to stabilize periodic organization of the molecules.

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Acknowledgments

The authors thank The Scientific and Technical Research Council of Turkey (TÜBİTAK) and Dokuz Eylül University Research Fund (respective project numbers: 105T372, 106T364, and 04.KB.FEN.100) for financial support of this work. In addition, financial support from Spanish Ministerio de Educacion y Ciencia (MAT2006-01997 and ‘Factoría de Cristalizacíon’ Consolider Ingenio 2010) is acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Ege University, Bornova, İzmir, 35100, Turkey

    Mahmut Ulusoy & Bekir Çetinkaya

  2. Department of Physics, Dokuz Eylül University, Buca, İzmir, 35160, Turkey

    Hasan Karabıyık & Muhittin Aygün

  3. Department of Chemistry, Pamukkale University, Kınıklı, Denizli, 20017, Turkey

    Rafet Kılınçarslan

  4. Departamento de Química Física y Analítica, Universidad de Oviedo, Oviedo, 33006, Spain

    Santiago García-Granda

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  1. Mahmut Ulusoy
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Correspondence to Hasan Karabıyık.

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Ulusoy, M., Karabıyık, H., Kılınçarslan, R. et al. Co(II) and Cu(II) Schiff base complexes of bis(N-(4-diethylamino-2-methylphenyl)-3,5-di-tert-butylsalicylaldimine): Electrochemical and X-ray structural study. Struct Chem 19, 749–755 (2008). https://doi.org/10.1007/s11224-008-9358-z

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