Browsing by Author "BOUGHOUGAL AMINA"

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    New model of metalloantibiotic: synthesis, structure and biological activity of a zinc(II) mononuclear complex carrying two enrofloxacin and sulfadiazine antibiotics†
    (NewJ.Chem., 2018, 42, 15346, 2018-08-06) BOUGHOUGAL AMINA
    A new model of the Zn-based complex, [Zn(LH)(Erx)(ErxH)]ClO4 (sulfadiazine: LH and enrofloxacin ErxH), has been synthesised with two different, but complementary antibiotics (sulfonamide and quinolon) following an easy procedure. To evaluate the synergetic effect of this multicomponent molecule, the mononuclear complexes [Zn(L)2(H2O)(NH3)] and [Zn(Erx)3] which each include only one of the two antibiotics (sulfadiazine: LH or enrofloxacin ErxH) were synthesized. All three compounds were characterized, including crystal structure determination by single-crystal X-ray diffraction. For all of the complexes, enrofloxacin is coordinated to Zn(II) by pyridinone and one oxygen atom of the carboxylate group in a monodente mode. The antibacterial activity, determined by the minimum inhibitory concentration on specific bacteria, has been studied on free ligands, on the corresponding mononuclear complexes and on our model
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    Novel copper (II) and zinc (II) complexes with enrofloxacin and oxolinic acid: synthesis, characterization, Hirshfeld surface and DFT/CAM-B3LYPD3BJ studies: NBO, QTAIM and RDG analysis
    (Journal of Molecular Structure, 2023-04-15) BOUGHOUGAL AMINA
    This study aimed to investigate the crystal structure of the synthesized complexes of Cu (II) and Zn (II) with enrofloxacin and oxolinic acid. The characterization of the complexes was carried out using single–crystal x-ray diffraction, Hirshfeld surface and 1 H NMR spectroscopy. In addition, a DFT/6-31g(d) investi- gation was conducted to assess the performance of two exchange-correlation functionals CAM-B3LYP and CAM-B3LYPD3BJ to predict both covalent and non-covalent bonds lengths, and the vibrational frequencies of the metallic complexes. The main findings of this study indicate that the interaction between each metallic ion and the cor- responding ligand leads to significant modifications in bond lengths, Mulliken charge distribution and electrostatic potential values in the complex molecules as compared to the ligands alone. To gain fur- ther insights into these complexes, several calculations were performed, such as Natural Atomic orbitals (NAO), Natural Bond orbitals (NBO), and Quantum Theory of Atoms in Molecules (QTAIM) analysis. The non-covalent interactions were explored and visualized in two and three-dimensional spaces with the help of the Reduced electron Density Gradient (RDG) approach.