Synthesis, crystal structure and other properties of the complexes of Er(III), Yb(III) and Lu(III) with 4,4′-bipyridine and dichloroacetates

Abstract

A novel mixed-ligand complexes of Er(III), Yb(III) and Lu(III) with title ligands were prepared and characterized by chemical and elemental analysis and IR spectroscopy, conductivity (in methanol, dimethyloformamide and dimethylsulphoxide). The thermal properties of complexes in the solid state were studied. The mode of metal-ligand coordination was discussed. The title compounds are isomorphic and isostructural in solid state. All atoms in studied compounds lie in general positions but occurrence of inversion on the midpoint of the bond linking two pyridine rings leads to existence in asymmetric unit one complex molecule and half of outer coordination sphere 4-bpy molecule. All chelating carboxylate groups are symmetrically bonded to the metal cations. The molecules of studied compounds are connected to the three dimensional network via O-HÁÁÁO and O-HÁÁÁN intermolecular hydrogen bonds. In the structures also exist C-HÁÁÁO, C-HÁÁÁCl weak hydrogen bonds and pÁÁÁÁp stacking interactions.

Thermal behavior and other properties of Pr(III), Sm(III), Eu(III), Gd(III), Tb(III) complexes with 4,4′-bipyridine and trichloroacetates

“…The IR spectra of Ln(4-bpy) 1.5 (CCl 3 COO) 3 ÁH 2 O (Ln(III) = Pr, Sm, Eu) show asymmetric m as (COO) and symmetric m s (COO) vibration of -COO groups in the range 1671-1646 and 1371-1367 cm -1 , respectively. On the grounds of spectroscopic criteria [44,[48][49][50][51] it can by stated, that in case of Pr(III), Sm(III) and Eu(III) complexes carboxylate groups are bonded as bidentate chelating ligand (the values of Dm = m as -m s of these complexes are smaller than for sodium salt Dm Na = 324).…”

“…In combination with carboxylate groups 4-bpy makes up interesting structures [35][36][37][38][39]. Our studies presented here complete series of lanthanides metal complexes with 4,4 0 -bipyridine and halogenoacetates [35,[40][41][42][43][44].…”

Interplay of thermochemistry and Structural Chemistry, the journal (volume 21, 2010) and the discipline

“…New mixed-ligand lanthanide complexes of Er(III), Yb(III), and Lu(III) with 4,4 0 -bipyridine and dichloroacetates were prepared by Czylkowska et al [116]. X-ray crystal structures of the complexes were determined as well as elemental, IR spectroscopic analysis, conductivity measurements, and thermal studies (TG-DTA-DTG) were performed.…”

Synthesis, thermal study and some properties of Gd(III), Tb(III), Dy(III) and Er(III) complexes with 4,4′-bipyridine and dibromoacetates

“…In the literature [1,2], there are described compounds, where there is only one type of coordination of carboxylate ligands. The papers [3][4][5][6][7][8][9][10] are examples to occur different possibilities of binding COO groups in one compound.…”

“…Lu without Pm(III)) with 4,4 0 -bipyridine and di-or trichloroacetates were reported [6][7][8][9][10][11][12][13][14]. This paper presents the results of new lanthanide complexes with title ligands.…”