Tevfik ATALAY, E. Güler AKGEMCİ

266285

Thermodynamic Studies of Some Complexes of 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone

The stability constants of the Co(II), Ni(II), Cu(II) and Zn(II) complexes with 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone were determined using a spectrophotometric method at different temperatures (25, 30, 35 and 40 \pm 0.1oC) and ionic strengths (0.05, 0.01 and 0.20 M KNO3) in 50 % (v/v) aqueous ethanol. Plots of thermodynamic stability constants at zero ionic strength (\ln Ko) versus T-1 gave linear curves and D Ho and D So were also calculated from these plots. Moreover, the changes in free energy for each metal-ligand system were calculated from the following equation. D Go = -RT \ln Ko.

Anahtar Kelimeler:

Stability, thiosemicarbazone, ligand, thermodynamic, spectrophotometry.

Thermodynamic Studies of Some Complexes of 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone

The stability constants of the Co(II), Ni(II), Cu(II) and Zn(II) complexes with 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone were determined using a spectrophotometric method at different temperatures (25, 30, 35 and 40 \pm 0.1oC) and ionic strengths (0.05, 0.01 and 0.20 M KNO3) in 50 % (v/v) aqueous ethanol. Plots of thermodynamic stability constants at zero ionic strength (\ln Ko) versus T-1 gave linear curves and D Ho and D So were also calculated from these plots. Moreover, the changes in free energy for each metal-ligand system were calculated from the following equation. D Go = -RT \ln Ko.

Keywords:

Stability, thiosemicarbazone, ligand, thermodynamic, spectrophotometry.,

Turkish Journal of Chemistry-Cover

ISSN: 1300-0527
Yayın Aralığı: 6
Yayıncı: TÜBİTAK

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Thermodynamic Studies of Some Complexes of 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone

Tevfik ATALAY, E. Güler AKGEMCİ