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Structural, thermal kinetics and thermodynamics study of new mixed ligand zinc complexes

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An Erratum to this article was published on 02 November 2016

Abstract

Two new zinc(II)-2-chlorophenylacetate complexes, {[Zn(2-Cl-C6H4CH2COO)2(Phen)](2-Cl-C6H4CH2COOH)2, 1 and [Zn(2-Cl-C6H4CH2COO)2(bipy)](2-Cl-C6H4CH2COOH)2, 2} with nitrogen donor ligands, 1,10-phenanthroline (phen) and 2,2′-bipyridine (bipy), were synthesized and characterized by IR spectroscopy and single crystal diffraction. Distorted octahedral geometry was confirmed in both complexes. The compounds were studied for the thermal stabilities using TG and DTA methods at different heating rates (283, 288 and 293 K min−1). It was found that both the complexes show the same trend in stabilities and thermally degrade in two stages. The apparent activation energies for each step of specific conversions were determined using the Doyle–Ozawa calculation method according to ICTAC recommendations. The calculated average activation energies for 1 were found to be 17.52/10.19 J mol−1 for the first and second stages of degradation, respectively. Similarly, for 2 corresponding values for the two-stage degradation were found to be 12.45 and 3.485 J mol−1. Determining the enthalpy value of the activation revealed an exergonic nature of the thermal degradation.

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Authors and Affiliations

  1. Department of Chemistry, Abdul Wali Khan University, Mardan, Pakistan

    Niaz Muhammad, Muhammad Ikram, Sadia Rehman, Mohammad Ibrahim &  Viola

  2. Institut für Biochemie, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Straße 4, 17487, Greifswald, Germany

    Carola Schulzke

Authors
  1. Niaz Muhammad
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  2. Muhammad Ikram
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  3. Sadia Rehman
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  4. Mohammad Ibrahim
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  5. Viola
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  6. Carola Schulzke
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Correspondence to Niaz Muhammad or Muhammad Ikram.

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The authors declare no conflict of interest.

Additional information

The original version of this article was revised. The fourth and fifth author names were combined and published as Mohammad Ibrahim Viola. The correct author group is updated in the article.

An erratum to this article is available at http://dx.doi.org/10.1007/s10973-016-5916-6.

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Muhammad, N., Ikram, M., Rehman, S. et al. Structural, thermal kinetics and thermodynamics study of new mixed ligand zinc complexes. J Therm Anal Calorim 128, 627–637 (2017). https://doi.org/10.1007/s10973-016-5842-7

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  • DOI: https://doi.org/10.1007/s10973-016-5842-7

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