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Barta Holló, Berta; Radanović, Mirjana M.; Rodić, Marko V.; Krstić, Sanja; Jaćimović, Željko K.; Vojinović Ješić, Ljiljana S.
Inorganics, 02/2022, Volume: 10, Issue: 2Journal Article
The reactions of pyrazole derivative, i.e., ethyl-5-amino-1-methyl-1H-pyrazole-4-carboxylate (L) with zinc halogenides in methanolic solution and zinc nitrate and zinc acetate in acetonic solution are described. The formulae of synthesized compounds are ZnL2Cl2 (1), ZnL2Br2 (2), ZnL2I2·0.5MeOH (3), Zn(L)2(H2O)4(NO3)2 (4), and {ZnL(OAc)2}2 (5). Two complexes are obtained in form of single crystals: ZnL2Br2 (2) and Zn(L)2(H2O)4(NO3)2 (4). Their crystal and molecular structure were determined by single-crystal X-ray structure analysis. The FTIR spectra of compounds prove the complex formation with all five zinc salts. The complexes are characterized by conductometric and thermoanalytical measurements, and their antioxidative activity was also tested by the scavenging effect on the DPPH radical. Conductometric results, solvolytic stability, and antioxidative activity of the compounds are in correlation.
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