Original scientific paper

Complexes of Heavy Lanthanides and Yttrium with 3,4,5-Trimethoxybenzoic Acid

Wieslawa Ferenc ; Department of Inorganic and General Chemistry, Faculty of Chemistry Maria Curie-Sklodwska University, PL 20-031, Lublin, Poland
Beata Bocian ; Department of Inorganic and General Chemistry, Faculty of Chemistry Maria Curie-Sklodwska University, PL 20-031, Lublin, Poland

Abstract

3,4,5-Trimethoxybenzoates of yttrium and heavy lanthanides have
been obtained as anhydrous salts with a metal to ligand ratio of
1 : 3. They have colours, typical of Ln3+ ions. The carboxylate group
appears to be a symmetrical, bidentate, chelating ligand. 3,4,5-
Trimethoxybenzoates of heavy lanthanides are crystalline compounds
characterized by a low symmetry and large size of unit cells. The
complexes decompose in one step, forming oxides of the respective
metals. The solubilities in water at 293 Kfor yttrium and heavy
lanthanide 3,4,5-trimethoxybenzoates are in the order of 10-3 mol
dm-3. The magnetic moments for the complexes were determined
over the range of 77-298 K. They obey the Curie-Weiss law. The
values of /-! calculated for all compounds are close to those obtained
for Ln3+ by Hund and Van Vleck. The results show that there is
no influence of the ligand field on the 4f electrons of lanthanide ions.

Keywords

Hrčak ID:

176962

URI

https://hrcak.srce.hr/176962

Publication date:

1.5.1997.

Visits: 1.050 *