“…The hexadentate 1,3-pdta ligand (1,3-pdta = 1,3-propanediamine-N,N,N',N'-tetraacetate anion) has been used for preparation of complexes with many transition metal ions (Herak et al, 1984;Rychlewska et al, 2000;Radanović et al, 2001;Radanović et al, 2003;Radanović et al, 2004;Rychlewska et al, 2005;Rychlewska et al, 2007;Rychlewska et al, 2011). In relation to edta (edta = ethylenediamine-N,N,N',N'-tetraacetate), the 1,3-pdta ligand has longer diamine chain and is expected to coordinate hexadentatedly to metal ions of various size.…”