Determination of the number of inner-sphere water molecules in lanthanide(III) polyaminocarboxylate complexes

The hydration numbers of various dysprosium(III) polyaminocarboxylates have been determined from the DyIII-induced 17O NMR water shifts. The results are in good agreement with those obtained by other techniques. The data indicate that formation of polynuclear species occurs in the iminodiacetate and nitrilotriacetate systems.

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