Abstract
A general synthetic procedure for the preparation of Pd II and Pt II complexes with aminopolycarboxylate ligands is reported. These compounds are easily prepared from acetic acid solutions of MCl 2 and H 4L (M = Pd or Pt; L = EDTA, PDTA or CDTA). Two different kinds of compounds can be isolated, [M (H 4L) Cl 2] and (H 6L) [MCl 4]. In the case of platinum compounds, both structures can be easily distinguished using electronic spectroscopy. Complexes [M (H 2L)] have also been isolated from aqueous solutions of the chloro compounds. Salts (H 6L) [MCl 4] in aqueous solution are slowly converted into the corresponding complexes with coordinated L. The kinetics of this process have been studied in the case of the platinum compounds.
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