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Abstract The coordination behavior of chiral binucleating ligands of type 1 – 4 with various transition metals has been investigated. 1 H‐NMR Titration experiments with zinc(II) salts gave detailed structural information about the structure of the resulting zinc complexes. Ligand 1 forms an unusual C 3 ‐symmetric dinuclear zinc complex Zn 2 CIL 3 ( 8a ) which was characterized by X‐ray crystallography. Treatment of complex 8a with various carboxylic acids resulted in ligand‐exchange reactions. With ligand 2 , a hydroxo‐bridged dinuclear copper complex 15 was synthesized and its structure elucidated by X‐ray analysis. Solution studies UV and 1 H‐NMR spectroscopy of the reaction of ligand 3 with Zn II and N II salts revealed the formation of dimeric species of the type M 2 X 4 L 2 . Ligand 4 formed well‐defined dinuclear complexes with Ni II and Cu II salts of which the corresponding Ni II complex Ni 2 (AcO) 2 (ClO 4 ) 2 L ( 22a ) was characterized by crystal‐structure analysis.
Fahrni et al. (Thu,) studied this question.