
doi: 10.1039/a607736f
The complexing properties of aminomethylphosphonic acid, Gly-(P), and glycylaminomethylphosphonic acid, Gly-Gly-(P), with Pt II and Pd II were investigated pH-metrically at 25 °C and at an ionic strength of 0.1 mol dm -3 (KNO 3 ) using ‘out of cell’ titrations. The stability constants calculated indicate formation of complexes with a metal∶ligand molar ratio of 1∶1 and 1∶2. The species and their distribution determined pH-metrically were confirmed by 31 P and 1 H NMR titrations. Comparison of our results for Gly-(P) and Gly-Gly-(P) with those for glycine and glycylglycine and other common dipeptides shows that the complexing properties of Pd II and Pt II towards both types are very similar.
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