Yazar "Ziyadanoğullari B." seçeneğine göre listele

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  • [ X ]
    Öğe
    Characterization and spectrophotometric studies of new Cu(II), Ni(II), Zn(II) complexes with schiff base derived from 1,2-bis-(o-aminophenoxy)ethane and salicylaldehyde
    (2005) Aydin H.; Ziyadanoğullari B.; Temel H.
    The thermodynamic parameters of complexes of Cu(II), Ni(n), and Zn(II) cations with 1,2-bis-(o-aminophenoxy)ethane and salicylaldehyde were determined in 60% (v/v) DMF-water, with various ionic strengths (0.07, 0.13, and 0.2 M NaNO3), and at different temperatures (25, 30, 35, and 40 ± 0.1°C) using a spectrophotometric method. Sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water) (?G°, ?H°, ?S°) based on these formation constants were determined. The values of enthalpy change are negative for all systems. The ligand behaves toward the metal ion as a tetradentate ligand. The acid dissociation constant of ligand was investigated in 60% (v/v) DMF-water and calculated at different temperatures. Copyright © 2005 by Aydin, Ziyadanoğullari, Temel.
  • [ X ]
    Öğe
    Determination of stability constants and thermodynamic parameters of some metal complexes with 2-hydroxynaphthalin-1-carbaldehydene 1-naphtylamin
    (2005) Ziyadanoğullari B.; Aydin F.; Şahin E.; Aydin I.; Temel H.
    The thermodynamic parameters of complexes of Cu(II), Ni(II) and Zn(II) cations with hydroxynaphthalin-1-carbaldehydene-1-naphtylamin were determined in 60% (v/v) DMF-water, various ionic strengths (0.07,0.13, 0.2 M NaNO 3) and at different temperatures (25, 30, 35,40 ± 0.1°C) using a spectrophotometric method. The sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water 60% (v/v) DMF- water (?G0, ?H0, ?S0) based on these formation constants were determined. The acid dissociation constant of ligand was investigated in 60 % (v/v) DMF-water has also been calculated at different temperatures.