Characterization and spectrophotometric studies of new Cu(II), Ni(II), Zn(II) complexes with Schiff base derived from 192-bis-(o-aminophenoxy)ethane and salicylaldehydel
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Tarih
2005
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Maik Nauka/Interperiodica/Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The thermodynamic parameters of complexes of Cu(II), Ni(II), 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 degrees 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) (Delta G degrees, Delta H degrees, Delta S degrees) 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.
Açıklama
12th Symposium on Intermolecular Interactions and Molecular Conformations -- JUN 14-18, 2004 -- Pushchino, RUSSIA
Anahtar Kelimeler
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Kaynak
Russian Journal of Physical Chemistry
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
79
