Protonation of Diamines H_2N-(CH_2)_n-NH_2 (n = 2- 10) in NaCl aqueous Solution at Different Ionic Strengths

摘要

Protonation constants of diamines H_2N-(CH_2)_n-NH_2 (n = 3,4,5,6,8,10) were determined potentiometrically (H~+-glass electrode) in different NaCl aqueous solutions, at I <= 1 mol dm~(-3). Dependence on ionic strength was considered by using Debye-Huckel and Pitzer type equations. General relationships for both protonation constants and parameters for the dependence on ionic strength are reported.