Solution Studies on Co(II), Ni(II), Cu(II), and Zn(II) Complexes of Hexamethylenetetramine in Aqueous and Non-Aqueous Solvents

Figure 3

Titration curve of the ligand HMTA (𝐶_L=9.76×10⁻³ mol⋅L⁻¹) with HNO₃  5×10⁻² mol⋅L⁻¹.