- 作者: S. A. Abou Ali; G. Y. Ali; M. M. Osman
- 作者服務機構: Chemistry Department, Faculty of Science and Education, Alexandria University, Alexandria, Egypt
- 中文摘要: The complexes of N-(2-hydroxy-1-naphthalidene)anthranilic acid abbreviated (H/sub 2/NA) with some trivalent rare earth elements (Pr, Nd, Sm, Gd, Dy, Er and Yb) were prepared. The complexes were characterized by chemical and thermal analysis, ir and conductimetric methods. Two types of ionic complexes; Ln(HNA)/sub 2/OH.bcdot.2H/sub 2/O with Dy, Er and Yb, and Ln(HNA)/sub 2/OH with Pr, Nd, Sm and Gd were isolated. Coordination of the ligand with metal ions occurs through the carboxy group and the nitrogen atom. The acid dissociation constants K/sup 1/ and K/sup 2/ of H/sub 2/NA and the overall stability constants .beta./sub 1/ and .beta./sub 2/ of some lanthanide complexes in 75% (v/v) dioxan-water solutions were determined by the potentiometric method.
- 英文摘要: --
- 中文關鍵字: Complexes; lanthanides; acid-dissociation and stability constants; synthesis.
- 英文關鍵字: Complexes; lanthanides; acid-dissociation and stability constants; synthesis.