MULTINUCLEAR MAGNETIC-RESONANCE STUDY OF THE INTERACTION OF ALUMINUM(III)-(+)-TARTRATE COMPLEXES WITH ADDITIONAL METAL-IONS IN AQUEOUS-SOLUTION

The interaction of Al(Ill)-(+)-tartrate complexes with alkali, alkaline earth, transition and Group 13 metal ions in aqueous solution has been studied with use of H-1, C-13, O-17 and Al-27 NMR spectroscopy. For comparison, some Ga(III)-(+)-tartrate complexes were included. Dinuclear ditartrate-bridged complexes are favored in tartrate solutions of Al(III) and Ga(III), whereas dinuclear tritartrate-bridged complexes are preferred in tartrate solutions of AI(III) with alkali and alkaline earth metal ions. The strong alkaline earth metal ion complexing properties are reflected by the high sequestering capacities which were determined by titration procedures.