Oxime Analogs of Amino Acids and Peptides Are Efficient Ligands for Ni(II) Ions

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Date
1997-03Author
Onindo, Charles O.
Sliva, Tatiana Yu.
Kowalik-Jankowska, Teresa
Amirkhanov, Vladimir M.
Go̵wiak, Tadeusz
Fritskii, Igor O.
Kozo̵wski, Henryk
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Oxime derivatives of amino acids, amides, and peptides are very efficient ligands for NiII ions forming very stable water-soluble complexes. Oxime of amino acids amides forms octahedral and square-planar complexes with the same 4N coordination mode. The spectroscopic and X-ray diffraction studies indicate an unusual role for the hydrogen bond in NiH−1L2 species, which stabilizes the cis coordination of two ligands in a planar complex. Oxime analogs of natural amino acid can be much more efficient ligands than the parent molecules.