2025/04/01 by G. P. Zharkov, О. В. Филимонова, O. V. Filimonova +4 · 1 citation
Chemistry · #Analytical Chemistry and Chromatography #Chemical Reaction Mechanisms #Synthesis and Reactions of Organic Compounds
paper · doi:10.1134/s0036023625600492
crossref issued 2025/04/01 · crossref published 2025/04/01 · crossref published-print 2025/04/01 · openalex publication_date 2025/04/01 · crossref published-online 2025/06/30 · crossref created 2025/06/30 · openalex created_date 2025/10/10 · crossref deposited 2026/04/04 · crossref indexed 2026/07/28 · openalex updated_date 2026/07/31
Abstract Acid dissociation constants of functional groups in N-(2-hydroxyethyl)iminodipropionic acid have been determined by alkalimetric titration in aqueous solution with pH-potentiometric indication at I = 0.1 mol/L (KCl/KNO3) and t = 25 ± 1°C: pKa0 = 2.87 ± 0.02, pKa1 = 4.00 ± 0.02, and pKa2 = 9.25 ± 0.01. Complex formation of the compound with transition metal ions has been studied. It has been shown that the presence of 2-hydroxyetyl substituent in iminodipropionic acid leads to considerable decrease of stability of complexes with copper(II) and nickel(II), whereas the stability of coordination compounds with cobalt(II), zinc(II), and cadmium(II) slightly increases. Complexes with silver(I) cations exhibit relatively high stability. Assumptions on the structure of the studied complexes has been made on the basis of the data obtained.