The trihydrochloride monohydrate of N-(pyrid-2-ylmethyl)ethylenediamine-N,N ',N '-triacetic acid and its lanthanum(III) complex

摘要

We report the results of the investigation of N-(pyrid-2-ylmethyl)ethylenediamine-N,N',N'-triacetic acid (H(3)pedta) and its complexes with rare earth metal ions. The X-ray crystal structures of H(3)pedta . 3HCl . H2O and of the lanthanum(III) complex [La(pedta)(H2O)]. 2H(2)O were determined. The complex forms a polymer, lanthanum(III) has coordination number 10, one water molecule is coordinated. The water degradation of H(3)pedta . 3HCl . H2O and of the complex was investigated by thermoanalysis. Luminescence studies of the corresponding europium(III) complex in aqueous solution show three coordinated water molecules. [References: 25]