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Abstract
The polydentate ligand L has been prepared by treating 1,10-phenanthroline-2,9-dicarbaldehyde with hydroxylamine. This ligand and its complexes with ZnII, CuII, CdII, CoII and NiII were designed as potential agents for nucleic acid hydrolysis and have been characterized by elemental analysis, NMR spectroscopy, ES-MS and X-ray diffraction analysis. The ligand acts as a tridentate ligand in most cases, to form monomeric trigonal-bipyramidal, square-pyramidal or square-bipyramidal structures. In the case of metallation with cadmium nitrate it acts as a tetradentate ligand to give a pentagonal-bipyramidal structure. Dissociation of the oxime group to an oximate, which acts as an anionic bridging ligand, was observed in the case of metallation with zinc acetate thus giving rise to dimers and/or polymers.
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