Coordination polymer of lanthanum: synthesis, properties and crystal structure of [La(4,4′-bipyridine)(CCl2HCOO)3(H2O)] n

2015

New complexes with formulae: Ln(4-bpy)(CBr 2-HCOO) 3 Á3H 2 O (where Ln(III) = Gd, Tb, Dy) and Er(4-bpy) 1.5 (CBr 2 HCOO) 3 Á3H 2 O, were prepared and characterized by chemical, elemental analysis and IR spectroscopy. The nature of metal-ligand coordination was studied. All of them are crystalline. Gd(III), Tb(III) and Dy(III) complexes are isostructural in one group. Conductivity studies (in methanol, dimethyloformamide and dimethylsulfoxide) were also discussed. The thermal properties of complexes in the solid state were studied using TG-DTG techniques under dynamic flowing air atmosphere. TG-MS system was used for Tb(III) (as an example of isostructural compound) and Er (III) complexes to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis in dynamic flowing air atmosphere.

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Section: Introductionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

2015

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“…4,4 0 -Bipyridine is used as a potential ligand since two nitrogen donor atoms. This N-donor may create polymeric species [2][3][4][5][6]. Up to now, there are not many papers describing lanthanides complexes with bipyridine isomers and halogenoacetates [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Earlier, we had obtained the compounds with N-donor (4-bpy) and dichloroacetates of Y(III) and La(III) with general formulae: Y(4-bpy)(CHCl 2 COO) 3 ÁH 2 O and [La (4,4 0 -bipyridine)(CCl 2 HCOO) 3 (H 2 O)] n were described in [6,12]. They were characterized by elemental and thermal analysis, IR, and conductivity studies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, thermal behavior, and other properties of Y(III) and La(III) complexes with 4,4′-bipyridine and trichloro- or dibromoacetates

Markiewicz

2012

New Y(III) and La(III) complexes with 4-bpy (4,4 0 -bipyridine) and trichloro-or dibromoacetates with the formulae: Y(4-bpy) 2 (CCl 3 COO) 3 ÁH 2 O I, La(4-bpy) 1.5 (CCl 3 COO) 3 Á2H 2 O II, Y(4-bpy) 1.5 (CHBr 2 COO) 3 Á3H 2 O III, and La(4-bpy)(CHBr 2 COO) 3 ÁH 2 O IV were prepared and characterized by chemical, elemental analysis, and IR spectroscopy. Conductivity studies (in methanol, dimethyloformamide, and dimethylsulfoxide) were also described. They are small, crystalline substances. The way of metalligand coordination was discussed. The thermal properties of complexes in the solid state were studied by TG-DTG techniques under dynamic flowing air atmosphere. TG-FTIR system was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis in dynamic flowing argon atmosphere for La(III) compounds.

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Coordination behaviour and thermolysis of some rare-earth complexes with 4,4′-bipyridine and di- or trichloroacetates

Markiewicz

2009