Thermodynamic studies of some complexes of 4′-morpholinoacetophenone thiosemicarbazone

Abstract

Ni(II), Cu(II), Ag(I) and Hg(II) form 1:2 (metal—ligand) complexes with 4′-morpholinoacetophenone thiosemicarbazone. The stability constants of these complexes in 60% (v/v) aqueous DMF were determined at different ionic strengths (0.07, 0.13 and 0.20 M) and at different temperatures (25, 30, 35 and 40 ± 0.1°C) using a spectrophotometric method. From these constants, the thermodynamic stability constants and thermodynamic parameters (Δ G ⊖, Δ H ⊖, Δ S ⊖) were calculated.