Steric structure and thermodynamic aspects of the complexes of dysprosium (III) with aminobenzoic acids in aqueous solutions
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan (Russian Federation)
Steric structures of dysprosium (III) aminobenzoate complexes with the 1:1 and 1:2 molar ratio in aqueous solutions were determined on the basis of pH-metric and paramagnetic birefringence data. An increase in conjugation observed for the series of the acids, viz., benzoic, meta-, ortho-, and para-aminobenzoic acids, results in the increased stability of the complexes with the 1:1 and 1:2 composition. In the case of para-aminobenzoic acid, the polyhedra [DyL(H{sub 2}O){sub 6}]{sup 2+} and [DyL{sub 2}(H{sub 2}O){sub 4}]{sup +} are cubes with the ligands coordinated to one and two edges, respectively. In the case of meta-aminobenzoic acid, the polyhedra [DyL(H{sub 2}O){sub 6}]{sup 2+} and [DyL{sub 2}(H{sub 2}O){sub 4}]{sup +} are a dodecahedron with the ligand coordinated to one edge and a square anti-prism with the ligands coordinated to two edges, respectively. In the case of ortho-aminobenzoic acid, both the 1:1 and 1:2 complexes have structures that are intermediate between the structures of meta- and para-aminobenzoic acids.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 160323
- Journal Information:
- Russian Chemical Bulletin, Vol. 43, Issue 10; Other Information: PBD: Oct 1994; TN: Translated from Izvestiya Akademii Nauk. Seriya Khimicheskaya; No. 10, 1767-1770(Oct 1994)
- Country of Publication:
- United States
- Language:
- English
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