Study of benzoazacrown ligands complex formation with yttrium, lutecium and lanthanum cations in aqueous solutions
The protonation constants of benzoazacrown-compound L and the stability constants of the complexes formed by them with Y <sup>3+</sup>, Lu <sup>3+</sup>, La <sup>3+</sup> metal ions, were determined by potentiometric methods, at 25 <sup>0</sup>C and ionic strength 0.10 mol dm <sup>-3 in potassium nitrate. Fast complex formation is shown.</sup>