Calculation of the stability constants for complex formation of dioxovanadium(V) with methyliminodiacetic acid in various H2O + CH3OH solutions using the Kamlet-Abboud-Taft equation

The stability constants for the complex formation of VO2+ with methyliminodiacetic acid (MIDA) were determined in this study for various volume fractions of methanol (0-45 %, v/v) at T = 298 K, I = 0.1 mol dm(-3) (sodium perchlorate). Potentiometric and UV spectrophotometric methods were utilized for the collection of experimental data. Different species were investigated but the best model contained VO2HL and VO2L- for the employed data treatment. One-, two- and three-parameter Kamlet-Abboud-Taft (KAT) equations were applied for the determination and calculation of the solvato-chromic regression coefficients for the KAT models.