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Synthesis, Characterization, and Antioxidative Action of Lanthanide Complexes of N-Benzoylacetoneglycine

J. Q. Wu, Y. M. Song, R. W. Deng, and Z. N. Chen

Department of Chemistry, Lanzhou University, Lanzhou, 730000, China


Abstract: N-Benzoylacetoneglycine behaving as an unstable monobasic tridentate ligand has been isolated in the stabler sodium salt which has been used to prepare the corresponding lanthanide(III) complexes. The complexes have been characterized by elemental analysis, molar conductance, thermal analysis, and spectral data. β-Ketoenamine structure of the ligand and the bonding in the lanthanide chelates have been discussed on the basis of IR and 1H NMR spectral data. The nephelauxetic ratio (β), bonding parameter (b(1/2)), and Sinha's covalence parameter (δ) reflect obvious covalent nature for the complexes. Both the lanthanide complexes and sodium salt of N-benzoylacetoneglycine are good antioxidants.

Full paper in Portable Document Format: 533a210.pdf


Chemical Papers 53 (3) 210–214 (1999)

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