cis-IPDTA: An original polyaminopolycarboxylic chelating agent from isophoronediamine. Synthesis and thermodynamic characterization of metal complexes

An original diaminotetracarboxylic acid chelating agent (cis-IPDTA, cis-isophoronediamine-N,N,N′,N′-tetraacetic acid) was prepared starting from commercially available isophoronediamine. Its protonation constants and the stability of selected metal complexes were determined by potentiometric titrations. The coordination behavior of cis-IPDTA was compared with that of the linear congener BDTA and iminodiacetic derivatives.