The Rhodium(III) Complexes of Aspartic and Glutamic Acids

The chelating tendencies of the alpha amino acids with platinum group metal ions are well known; with the dibasic acids, complexes have been reported involving palladium(II) and platinum (II) with both aspartic and glutamic acids. There is no mention of the successful synthesis of complexes between these acids and rhodium (III), however. This communication reports a method of preparation for these two complexes as well as an alternative method for the synthesis of the palladium (II) complex with aspartic acid. It is shown that the mole ratio of rhodium (III) to aspartate or glutamate is one to three, that the ligands act as bidentates, and that the aspartic acid complex. Infrared and elemental analytical data are given.