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Synthesis and Structure of Cyclen Hydroxylamine Ligands and their Zinc(II)Complexes

Reichenbach-Klinke, R. ; Zabel, M. ; König, B.


The synthesis of two new zinc(II) complexes with 1,4,7,10-tetraazacyclododecan-1-ol and 1,4,7,10-tetraazacyclododecan-1,7-diol as ligands is described. One of these complexes is characterized by X-ray structure analysis. By coordination to the metal cation the acidity of the hydroxylamine groups of the ligands is significantly increased as confirmed by potentiometric pH titrations.

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