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Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

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Fig. 2. UV–Vis spectra of the STSC ligand  (5×10 -5  mol dm -3 ) in the presence of  inc-reasing concentrations of Cu(II) ions in  diffe-rent solvent mixtures with MeOH mass  frac-tions (w 1 ) at 298.15 K: A, w 1  = 1.00; B, w 1  =
Fig. 3. Absorbance plot () for the ligand STSC with Cu(II) ion against c M :c L  for different mass  fractions (w 1 ) of MeOH in different solvent mixtures at 298.15 K
Fig. 4. Molar conductance (Λ m ) vs. mole ratio  plot (c L :c M ) for the Cu(II)–STSC complex in  pure MeOH and different binary mixtures of  MeOH–DO at different temperatures: A, w 1  =
TABLE I. log K f  values for the Cu(II)–STSC complex obtained from complexometric tit- tit-rations in MeOH–DO binary mixtures at different temperatures; w 1  is the mass fraction of  MeOH in the binary solvent mixtures
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