pH-Potentiometric Investigation towards Chelating Tendencies of 𝑝-Hydroquinone and Phenol Iminodiacetate Copper(II) Complexes

Figure 2

Potentiometric titrations for the Cu(II)-H₄cacp (1 : 1) and Cu(II)-H₆bicah (2 : 1) systems (a) and (b), respectively) as a function of pH over the range 2.00–10.0 at molar concentration 2.50 mmol dm^−𝟑 based on ligand (25^∘C, 𝐼=0.10 mol dm^−𝟑 KCl, pK_𝑤=13.78, 𝛾=0.78, and HCl=0.111 mmol dm^−𝟑). The line denoted with black colour refers to the experimental titration curve while the red refers to the computational fitting of the obtained experimental data.

(a)

(b)