Synthesis, characterization and antioxidative capacity of nickel(II) and zinc (II) complexes with 4-methylpyrazole
- Autor(en)
- David Kocovic, Berta Barta Hollo, Ivana Borisev, Vukadin M. Leovac, Ljiljana Vojinovic Jesic, Gerald Giester, Sergiu Shova, Zoran D. Tomić, Željko K. Jaćimović
- Abstrakt
In this paper, the coordination of 4-methylpyrazole (L) to Ni(II) and Zn(II) ions is studied through the reactions of Ni(OAc)2⋅4H2O and Zn(OAc)2⋅2H₂O with 4-methylpyrazole in a 1:2 metal-to-ligand molar ratio in ethanol at room temperature. From the reaction mixtures, new complex compounds of formulae: [Ni(OAc)2L4] and [Zn(OAc)2L2] were crystallized. The crystal and molecular structure of the synthesized complexes were determined
by single-crystal X-ray structure analysis. The coordination environment of Ni(II) in its complex is octahedral, while that of Zn(II) is tetrahedral. The compounds are characterized by IR spectra and elemental analysis. Their
thermal stability, a crucial property, is analyzed by thermogravimetry. To get a better insight into the decomposition mechanism coupled TG-MS measurements were carried out, too. The tests of the antioxidative activity of the new complexes on DPPH radical showed that the Zn(II) complex is more effective than the Ni(II) complex.- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Institute for Medicines and Medical Devices of Montenegro, University of Novi Sad (UNS), Petru Poni Institute of Macromolecular chemistry, University of Belgrade, University of Montenegro
- Journal
- Inorganica Chimica Acta
- Band
- 574
- Seiten
- 1-10
- Anzahl der Seiten
- 10
- ISSN
- 0020-1693
- DOI
- https://doi.org/10.1016/j.ica.2024.122363
- Publikationsdatum
- 2025
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105116 Mineralogie, 105113 Kristallographie
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/d1650e5a-5540-4a16-8b51-1b320017aef6