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    Öğe
    Novel coordination compounds: Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) cations with acesulfame/N,N-diethylnicotinamide ligands
    (Taylor & Francis Ltd, 2019) Yildirim, Tugrul; Kose, Dursun Ali; Avci, Guelcin Alp; Sahin, Onur; Akkurt, Fatih
    Five coordination complexes with Mn2+ (1), Co2+ (2), Ni2+ (3), Cu2+ (4), and Zn2+ (5) containing acesulfame (ace) and N,N-diethylnicotinamide (dena) ligands were synthesized and structural binding properties investigated. Four compounds (1, 2, 4, and 5) were examined with single crystal X-ray diffraction methods. The structures containing Mn(II), Co(II), and Zn(II) were iso-structural. Six-coordination of metal cations were completed with two moles dena and four aqua ligands. The dena ligands were coordinated via pyridine nitrogen as neutral-monodentate. Charge stabilities of the complexes are complemented by two moles monoanionic ace ligands, located outside of the coordination unit. In the Cu(II) complex, the coordination is completed by acidic nitrogen and carbonyl oxygen atoms of two ace ligands and pyridine nitrogen of two moles dena ligands. The coordination to Cu(II) for ace ligands was monoanionic-bidentate. All metal cations in the structure are distorted octahedral. Thermal decomposition of complexes begins with removal of the aqua molecules from the structures and is completed by combustion of organic ligands. The final decomposition products of all structures have been identified as corresponding metal oxides. Some biological applications (anti-fungal/anti-bacterial) were studied using 1-5.
  • [ X ]
    Öğe
    Novel monoanionic diphenate-nicotinamide/N,N-diethylnicotinamide complexes of NiII, ZnII. Synthesis, structural investigations and hydrogen adsorption study
    (Elsevier, 2020) Yurdakul, Omer; Sahin, Zarife Sibel; Kose, Dursun Ali; Sahin, Onur; Akkurt, Fatih
    [No abstract available]
  • [ X ]
    Öğe
    Synthesis and Structural Characterization of a Binuclear Mixed-Ligand (Salicylate and N, N-diethylnicotinamide) Nickel(II) Complex, Its Magnetic Properties. [Ni2(μ-Sal)4(Dena)2]H2O
    (Wiley-V C H Verlag Gmbh, 2014) Kose, Dursun Ali; Akkurt, Fatih; Sahin, Onur; Buyukgungor, Orhan
    The title complex of [Ni-2(mu-Sal)(4)(Dena)(2)]H2O, [(mu-tetrakissalicylato-kappa-O,O)(bis-N,N- diethylnicotinamide-kappa-N)(binickel(II))] hydrate, C48H52Ni2N4O16, has been synthesized and explained as structure using some elemental analyses. FT-IR spectra, UV- Vis reflectance, magnetic measurements, thermal analysis and x-ray diffraction methods. The results showed that the unit cell of complex includes two molecules Ni-II cation, four molecules salicylates as bridge and two molecules N,N-diethylnicotinamide ligands, also there is one molecule hydrated aqua. The compound crystallizes in the monoclinic space group P2(1)/c with the following unit-cell parameters: a = 13.6776( 6) angstrom, b = 10.5238( 3) angstrom, c = 21.8165( 9), alpha = 90.00 degrees, beta = 126.546( 3)degrees, gamma = 90.00 degrees and Z = 2. The compound [Ni-2(mu-Sal)(4)(Dena)(2)]H2O is a typical paddle-wheel complex structure. Two Ni-II ions are bridged by four salicylate ligands (O2, O2(i), O3, O3(i), O5, O5(i), O6 and O6(i)) using a mu-COO- coordination mode [symmetry code: (i) 1-x, 1-y, 1-z]. Each Ni-II also coordinates to one nitrogen atom (N1 and N1(i)) from one N,N-diethylnicotinamide ligand molecule in the axial position. The complex has strong paramagnetic properties.