Determination of Thermodynamic Parameters of some Complexes of 9-ethyl-3-carbazolecarboxaldehyde 4-phenyl-3-thiosemicarbazone (ECCAPT)

Authors: E. GÜLER AKGEMCİ, TEVFİK ATALAY

Abstract: The complexes of Cu(II), Co(II), Zn(II), and Cd(II) with 9-ethyl-3-carbazolecarboxaldehyde 4-phenyl-3-thiosemicarbazone were synthesized and their stability constants were determined using a spectrophotometric method at different temperatures (25, 30, 35 and 40 \pm 0.1°C) and ionic strengths (0.05, 0.01 and 0.20 M KNO_3) in 50% (v/v) aqueous DMF. From these constants, the thermodynamic stability constants and thermodynamic parameters (\Delta G°, \Delta H° and \Delta S°) were calculated.

Keywords: Spectrophotometry, thiosemicarbazone, thermodynamic, ligand, stability.

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