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

Abstract

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.

Structural, thermal, and spectral investigations of the lanthanide(III) biphenyl-4,4′-dicarboxylates

“…At a higher temperature (575°C), the molecules of carbon monoxide are released and their characteristic double-band with the maxima at 2160, 2105 cm -1 are detected. Around 600°C the weak absorption bands at 3080, 3040, and 1300-850 cm -1 corresponding to the stretching and deformation vibrations of m(C-H) groups come from hydrocarbons [22][23][24][25][26][27].…”

Synthesis and some properties of light lanthanide complexes with 4,4′-bipyridine and dibromoacetates

“…The synthesized complexes containing 4-bpy and dibromoacetates are small crystalline. and isostructural in two groups: La(III) [11], Ce(III); and Pr(III), Nd(III), Sm(III).…”

“…Thermal studies of compounds with empirical formulae Ln(2-bpy) (CHBr 2 COO) 3 ÁmH 2 O where Ln(III) = Nd, Er were characterized in [10]. In one of our previous articles, we have described preparation and some behaviors of La(III) and Y(III) complexes with title ligands [11]. In this work, we present the synthesis, some physicochemical properties, and thermal studies of new compounds of light rare earth elements with 4-bpy and dibromoacetates.…”

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

“…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.…”