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  • Küçük Resim
    Öğe
    Synthesis, characterization, and antimicrobial activity of a new pyrimidine Schiff base and its Cu(II), Ni(II), Co(II), Pt(II), and Pd(II) complexes
    (Turkish Journal of Chemistry, 2012) Gülcan, Mehmet; Sönmez, Mehmet; Berber, İsmet
    A new Schiff base, {1-[(5-bromo-2-hydroxy-benzylidene)- amino]-4-phenyl-2-thioxo-1,2-dihyro-pyrimidin-5-yl}-phenyl-methanone, was synthesized from N-amino pyrimidine-2-thione and 5-bromsalicylaldehyde. Metal complexes of the Schiff base were prepared from acetate salts of Cu(II), Ni(II), Co(II), Pd(II), and PtCl2 in methanol. The chemical structures of the Schiff base ligand and its metal complexes were confirmed by spectroscopic analysis. All of the compounds were evaluated for their antimicrobial against 4 gram-positive bacteria, 1 gram-negative bacterium, and 3 yeast strains. The Schiff base and the Cu(II) and Co(II) complexes showed good biological activity against all tested bacteria and yeast strains.
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    Öğe
    Synthesis, characterization, antioxidant and antimicrobial studies of Cu(II), Co(II), Ni(II) and Mn(II) complexes with a new schiff base ligand containing a pyrimidine moiety
    (Sphinx Knowledge House, 2016) Soğukömeroğullari, Hatice Gamze; Sönmez, Mehmet; Berber, İsmet
    The new Schiff base ligand derived from 2-hydroxy-5-methoxybenzaldehyde and 1-amino-5-benzoyl-4-phenyl-1H-pyrimidine-2-one and its metal complexes (Cu(II), Co(II), Ni(II) and Mn(II)) have been synthesized. Schiff base ligand and its complexes were characterized by elemental analysis, magnetic measurement, molar conductivity, IR, NMR (for ligand) and Mass spectral studies. All the compounds have encouraged us to study on their antioxidant properties and antimicrobial activities against Gram-positive, Gram-negative bacteria and fungi using microdilution procedure. Cu(II) (1a) and Co(II) (1b) metallic complexes might be possible as substances to eliminate the free radicals and against the antimicrobial agent. © 2016, Sphinx Knowledge House. All rights reserved.
  • [ X ]
    Öğe
    Synthesis, characterization, biological studies, and molecular modeling of mixed ligand bivalent metal complexes of Schiff bases based on N-aminopyrimidine-2-one/2-thione
    (2015) Soğukömeroğullari, Hatice Gamze; Taşkin, Tuğba Tok; Yilmaz, Feyza; Sönmez, Mehmet; Berber, İsmet
    Abstract: New mixed Schiff bases, Cu(II), Co(II), Ni(II), and Mn(II) complexes, were synthesized derived from 5-chloro-2-hydroxyacethophenone and 1-amino-5-benzoyl-4-phenyl-1H-pyrimidine-2-one/thione. These complexes were characterized by elemental analysis, magnetic measurements, molar conductivity, IR, electronic, NMR, and mass spectral studies. All the complexes showed nonelectrolytic behavior. Moreover, the newly synthesized mixed ligand complexes were evaluated for their in vitro antimicrobial efficiency against bacteria and yeast. The compound named Co(L1L) had good antifungal activity against Candida species, but no profound antibacterial effect against bacterial strains. In addition, the ground state geometries of the complexes were optimized using a semi-empirical method at PM6 level, which is a suitable and effective basis set for organometallic and large structures to obtain information about their 3D geometries and electronic structures.