Yazar "Ilhan, S" seçeneğine göre listele

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    Öğe
    Spectroscopic and conductance studies of new transition metal complexes with a Schiff base derived from 4-methoxybenzaldehyde and 1,2-bis(p-aminophenoxy)ethane
    (Taylor & Francis Inc, 2003) Çakir, Ü; Temel, H; Ilhan, S; Ugras, HI
    Four new metal complexes of Cu(II), Ni(II), Zn(II) and Co(III) with Schiff base derived from 4-methoxybenzaldehyde and 1,2-bis(p-aminophenoxy)ethane have been prepared and characterized by magnetic susceptibility, conductance measurements, elemental analyses, UV-Vis, H-1 NMR and IR spectra studies. The magnetic and spectroscopic data indicate an octahedral geometry for the six-coordinate complexes. The ligand was used for complexation studies. Stability constants were measured by means of a conductometric method. Furthermore, the stability constants for complexation between ZnCl2, Cu(NO3)(2) and AgNO3 salts and ligand (L) in 80% dioxane-water and pure methanol were determined from conductance measurements. In 80% dioxane-water, the stability constants (log Ke) increase inversely with the crystal radii in the order Ag(I) < Zn(II) < Cu(II).
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    Öğe
    Synthesis and characterization of a new bidentate Schiff base and its transition metal complexes
    (Taylor & Francis Inc, 2002) Temel, H; Ilhan, S; Sekerci, M
    The new bidentate Schiff base ligand L was synthesized by treating cinnamaldehyde with 1,2-bis(p-aminophenoxy)ethane. The complexes of Cu(II), Ni(II), Zn(II) and Mn(II) with the Schiff base have been characterized by magnetic susceptibility, conductance measurements, elemental analyses, IR, UV-Vis, H-1 and C-13 NMR studies. The analytical, conductance, spectral and magnetic data support the mononuclear formulations of these complexes with M:L = 1:2. In addition there are two hydroxo ligands present.
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    Öğe
    The synthesis and spectral characterization of new Cu(II), Ni(II), Co(III), and Zn(II) complexes with Schiff base
    (Taylor & Francis Inc, 2002) Temel, H; Ilhan, S; Sekerci, M; Ziyadanogullari, R
    Cu(II), Ni(II), Co(III) and Zn(II) complexes with Schiff base have been prepared. Ligand is derived from condensation of 1,2-bis(p-aminophenoxy)ethane and 2-hydroxynaphthalin-1-carbaldehyde. The complexes have been characterized by elemental analyses, Lambda(M), IR, UV-VIS, H-1 NMR, C-13 NMR and magnetic measurements. The ligand is coordinated to the central metal as a tetradentade ONNO ligand. The four bonding sites are the azomethine nitrogen and aldehydic-OH groups.
  • [ X ]
    Öğe
    Synthesis, spectral studies, and determination of stability constants and thermodynamic parameters for some aromatic diamine transition-metal complexes
    (Pleiades Publishing Inc, 2006) Temel, H; Ziyadanogullari, B; Alp, H; Aydin, I; Aydin, F; Ilhan, S
    The Cu(II) and Zn(II) complexes of aromatic bidentate diamines were prepared and characterized by different analytical and spectral methods. Thermodynamic parameters of complexes of Cu(II) and Zn(II) cations with 1,3-bis(p-aminophenoxy)propane were determined in 60 vol. % DMF-H2O at various ionic strengths (0.07, 0.13, 0.2 M NaNO3) and different temperatures (45, 50, 55, 60 +/- 0.1 degrees C) using a spectrophotometric method. The NaNO3 solution was used to maintain the ionic strength. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters of 60 vol. % DMF-H2O (Delta G degrees, Delta H degrees, Delta S degrees) based on these formation constants were determined.