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Platinum Blues - a Study of the Interaction between Potassium Tetrachloroplatinate and Asparagine

Abstract Potassium tetrachloroplatinate and asparagine form a paramagnetic complex in aqueous solution. This complex which displays a blue green color has been studied by ESR and IR spectroscopy. The ESR spectra are interpreted to be due to tervalent platinum in a low spin d7 configuration. The IR data suggest that the doubly deprotonated ligand is coordinated through the COO- and CONH- groups.