Synthesis, Physicochemical, Thermal and Antioxidative Properties of Zn(II) Coordination Compounds with Pyrazole-Type Ligand

The reactions of pyrazole derivative, i.e., ethyl-5-amino-1-methyl-1H-pyrazole-4-carboxylate (L) with zinc halogenides in methanolic solution and nitrate acetate acetonic are described. formulae synthesized compounds ZnL2Cl2 (1), [ZnL2Br2] (2), ZnL2I2·0.5MeOH (3), [Zn(L)2(H2O)4](NO3)2 (4), {ZnL(OAc)2}2 (5). Two complexes obtained form single crystals: (2) (4). Their crystal molecular structure were determined by single-crystal X-ray analysis. FTIR spectra prove the complex formation all five salts. characterized conductometric thermoanalytical measurements, their antioxidative activity was also tested scavenging effect on DPPH radical. Conductometric results, solvolytic stability, correlation.