Lanthanide(III) Complexes of Oxamic Acid

Perlepes, S. P.; Zafiropoulos, Theodoros F.; Kouinis, J. K.; Galinos, A. G.

doi:10.1515/znb-1981-0609

Cited by 20 publications

(2 citation statements)

References 30 publications

(41 reference statements)

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“…anticancer or antibacterial activity) and coordination flexibility of carboxylate or oxamate derivatives thus motivated the preparation of the novel zinc(II) mixedligand complex containing N- (2,6-dimethylphenyl)oxamate (Hpma -) and 1,10-phenanthroline, as well as its characterisation by elemental microanalysis, FT-IR, NMR, UV-Vis spectroscopy and single-crystal X-ray diffraction. The oxamate derived ligand can have diverse chelating properties with transition or f-block metals, with potential to coordinate monodentately, bidentately (O,Oor N,O-donor), tridentately (N,O,O-or O,O,O-donor) or by adopting bridging modes in monoanionic or dianionic form [5][6][7][8][9]. The monoanionic or dianionic ligands are due to the ionisability of the carboxylic and amide protons, enabling preparation of dinuclear or polynuclear complexes [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure of a mixed-ligand zinc(II) complex derived from ethyl (2,6-dimethylphenylcarbamoyl) formate and 1,10-phenanthroline

Madanhire¹,

Brecht²,

Abrahams³

2023

Bull. Chem. Soc. Eth.

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ABSTRACT. A mixed-ligand zinc(II) complex, [Zn(Hpma)(phen)Cl] (where Hpma– = N-(2,6-dimethylphenyl)oxamate and phen = 1,10-phenanthroline), has been prepared by the reaction of zinc chloride, ethyl (2,6-dimethylphenylcarbamoyl)formate (Hdmp) and 1,10-phenanthroline under basic conditions in dimethylformamide. The structure of the complex was characterised by elemental analysis, IR, 1H-NMR, UV-Vis absorption and X-ray crystallography. The metal complex crystallises in the monoclinic system (space group P21/c) and is composed of the five-coordinate zinc ion in a distorted spherical square pyramidal geometry. Stabilisation of single crystals occurs through hydrogen bonds and π-π stacking interactions. KEY WORDS: Zinc(II), N-(2,6-Dimethylphenyl)oxamate, 1,10-Phenanthroline, Crystal structure, Hydrogen bonding, π-π Stacking, Mixed-ligand Bull. Chem. Soc. Ethiop. 2023, 37(4), 891-900. DOI: https://dx.doi.org/10.4314/bcse.v37i4.7

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Section: Introductionmentioning

confidence: 99%

Synthesis and crystal structure of a mixed-ligand zinc(II) complex derived from ethyl (2,6-dimethylphenylcarbamoyl) formate and 1,10-phenanthroline

Madanhire¹,

Brecht²,

Abrahams³

2023

Bull. Chem. Soc. Eth.

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“…Likewise, the coordination chemistry of oxamic acid received limited attention. It is mostly focused on the coordination modes (through carboxylate or amide groups) and spectroscopic data; for examples of transition metal’s complexes, see refs – ; for lanthanide’s complexes, see refs – .…”

Section: Introductionmentioning

confidence: 99%

Homogeneous Precipitation of Lanthanide Oxalates

2022

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Oxalic acid is an important separation agent in the technology of lanthanides, actinides, and transition metals. Thanks to the low solubility of the oxalate salts, the metal ions can be easily precipitated into crystalline material, which is a convenient precursor for oxide preparation. However, it is difficult to obtain oxalate monocrystals due to the fast precipitation. We have developed a synthetic route for homogeneous precipitation of oxalates based on the thermal decomposition of oxamic acid. This work primarily concerns lanthanide oxalates; however, since no information was found about oxamic acid, a brief characterization was included. The precipitation method was tested on selected elements (Ce, Pr, Gd, Er, and Yb), for which the kinetics was determined at 100 °C. Several scoping tests at 90 °C or using different starting concentrations were performed on Ce and Gd. The reaction products were studied by means of solid-state analysis with focus on the structure and morphology. Well-developed microcrystals were successfully synthesized with the largest size for gadolinium oxalate.

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Antimicrobial, antioxidant and antitumor activities of Nano‐Structure Eu (III) and La (III) complexes with nitrogen donor tridentate ligands

Hassan

Mohamed

2019

Applied Organom Chemis

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Nano structure metal complexes of Eu (III) and La (III) with two different nitrogen donor tridentate ligands: N‐(2‐Aminoethyl)‐1,3‐propanediamine “AEPD = L1” and 1‐(2‐Aminoethyl)piperazine “AEPz = L2”, were prepared. All synthesized compounds were identified and confirmed by elemental analyses, molar conductivity and spectral analyses (UV–Visible, IR and mass). Conductance measurement indicates that all the complexes are non‐electrolytic in nature and the complexes were isolated in 1:1 molar ratio (metal: ligand). Thermal decomposition profiles were consistent with the proposed formulations. The ligands behave as a tridentate ligand through three nitrogen centers of donation. The nano‐size was investigated by using transmission electron microscopy (TEM). The geometric structure properties were analyzed using density functional theory (DFT) for ligands and their Lanthanum (III) complexes. The complexes were screened against some bacteria strains, hepatocellular cell line and diphenylhydrazine free radical. The molecular docking active sites interactions were evaluated.

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Lanthanide(III) Complexes of Oxamic Acid

Cited by 20 publications

References 30 publications

Synthesis and crystal structure of a mixed-ligand zinc(II) complex derived from ethyl (2,6-dimethylphenylcarbamoyl) formate and 1,10-phenanthroline

Synthesis and crystal structure of a mixed-ligand zinc(II) complex derived from ethyl (2,6-dimethylphenylcarbamoyl) formate and 1,10-phenanthroline

Homogeneous Precipitation of Lanthanide Oxalates

Antimicrobial, antioxidant and antitumor activities of Nano‐Structure Eu (III) and La (III) complexes with nitrogen donor tridentate ligands

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