Structural studies of bis-(2,6-diacetylpyridine-bis-(phenylhydrazone)) and X-ray structure of its Y(III), Pr(III), Sm(III) and Er(III) complex

Tamboura, Farba Bouyagui; Haba, P. M.; Gaye, Mohamed; Sall, Abdou Salam; Barry, Aliou Hamady; Jouini, Tahar

doi:10.1016/j.poly.2004.01.014

Cited by 43 publications

(8 citation statements)

References 11 publications

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“…Stricto sensus, Y(III) is not a lanthanide ion, however, it is usually compared to La because these ions have the electronic configuration of the noble gases [Kr] and [Xe], respectively. Moreover, the chemical behavior of Y(III) ion is known to be similar to that of the Ln(III) ions and numerous examples of isostructural compounds have been reported [5,29,30]. For the two compounds reported here this isostructurality does not apply, at least as far as the supramolecular organization is concerned.…”

Section: Resultsmentioning

confidence: 80%

Dissimilar supramolecular organization for the heterotrimetallic assemblage [{LNiLn}{W(CN)8}] with Ln = Y and La (L = Schiff-base derivative)

Sutter

Dhers

Costes

et al. 2008

Comptes Rendus. Chimie

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Heterotrimetallic {3de5de4f} compounds have been prepared by assemblage of {W(CN) 8 } 3À and {L Me2 NiLn} 3þ units, with Ln ¼ Y (1) and La (2). These have been found to exhibit different supramolecular organizations. A chain structure is formed for Ln ¼ Y, whereas La leads to a hexanuclear aggregate. The investigation of the magnetic behavior for these compounds revealed ferromagnetic WeNi interaction with J ¼ 20 cm À1 for 2. To cite this article:

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Section: Resultsmentioning

confidence: 80%

Dissimilar supramolecular organization for the heterotrimetallic assemblage [{LNiLn}{W(CN)8}] with Ln = Y and La (L = Schiff-base derivative)

Sutter

Dhers

Costes

et al. 2008

Comptes Rendus. Chimie

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“…O9, O10, N1 and N4 are the only four atoms that occupy the equatorial plane of Erx-en and the axial plane containing O15, O16. The bond angles varied between 70.37° to 151.06° for N1-Y-O15, N1-Y-O16, N4-Y-O16 and O15-Y-O16 (Table S3) [60][61][62][63][64]. The bond lengths between Y(III) and their coordinated atoms were calculated (Table S3).…”

Section: Molecular Modeling Of Complexesmentioning

confidence: 99%

“…Natural population analysis (NPA) served as the foundation for the charge distri- S3) [60][61][62][63][64]. The bond lengths between Y(III) and their coordinated atoms were calculated (Table S3).…”

Section: Charge Distribution Analysismentioning

confidence: 99%

Novel Enrofloxacin Schiff Base Metal Complexes: Synthesis, Spectroscopic Characterization, Computational Simulation and Antimicrobial Investigation against Some Food and Phyto-Pathogens

Mohamed

Ahmed²,

Zordok

et al. 2022

Inorganics

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Condensation of the reaction between enrofloxacin and ethylenediamine in the existence of glacial acetic acid produced a new N,N-ethylene (bis 1-cyclopropyl-7-(4-ethylpiperazin-1-yl)-6-fluoro-1,4-dihydroquinoline-3-carboxylic acid Schiff base (H2Erx-en). H2Erx-en was used as a tetra-dentate ligand to produce novel complexes by interacting with metal ions iron(III), yttrium(III), zirconium(IV), and lanthanum(III). The synthetic H2Erx-en and its chelates had been detected with elemental analysis, spectroscopic methods, mass spectrometry, thermal studies, conductometric and magnetic measurements experiments. The calculated molar conductance of the complexes in 1 × 10−3 M DMF solution shows that iron(III), yttrium(III) and lanthanum(III) are 1:1 electrolytes, however the zirconium(IV) complex is non-electrolyte. The infrared spectra of H2Erx-en chelates indicated that the carboxylic group is deprotonated and H2Erx-en is associated with metals as a tetra-dentate through nitrogen and oxygen atoms. The disappearance of the carboxylic proton in all complexes corroborated information concerning H2Erx-en deprotonation and complexation with metal ions, according to 1H NMR data. Thermal analysis revealed the abundance of H2O particles in the chelates’ entrance and outlet spheres, indicating the disintegration pattern of H2Erx-en and their chelates. The Coats–Redfern and Horowitz–Metzeger approaches were utilized to calculate the thermodynamic items (Ea, ΔS *, ΔH *, and ΔG *) at n = 1 and n ≠ 1. The resulting data reveal better organized chelate building activation. Density functional theory (DFT) was created to properly grasp the optimal architecture of the molecules. The chelates are softer than H2Erx-en, with estimates varying between 95.23 eV to 400.00 eV, compared to 31.47 eV for H2Erx-en. The disc diffusion technique was utilized to assess H2Erx-en and their chelates in an antimicrobial assay against various food and phytopathogens. The zirconium(IV) chelate has the most potent antibacterial action and is particularly efficient against Salmonella typhi.

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“…At the same time, there is a family of acyclic pentadentate (N 3 O 2 ) ligands obtained from the condensation reactions of 2,6-diacetylpyridine with various hydrazides (Scheme 1), which are widely used for the targeted synthesis of the PBP complexes of 3d metals. In these complexes, depending on the synthesis conditions, the ligand forms a rigid neutral or charged (−1 or −2) pentagonal-equatorial plane around the metal ion, and the final coordination of PBP is completed by two apical ligands (usually solvent molecules and/or various simple anions) [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. In 2018, Sutter's group first synthesized the isostructural PBP complexes of Dy and Tb using an acyclic pentadentate ligand, 2,6-diacethylpyridine bis(salicylhydrazone) (H 4 DAPS, Scheme 1): (Et 3 NH) + [Ln III (H 2 DAPS)Cl 2 ] -(Ln= Tb, Dy, Y 0 .…”

Section: Introductionmentioning

confidence: 99%

A Series of Novel Pentagonal-Bipyramidal Erbium(III) Complexes with Acyclic Chelating N3O2 Schiff-Base Ligands: Synthesis, Structure, and Magnetism

et al. 2021

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A series of six seven-coordinate pentagonal-bipyramidal (PBP) erbium complexes, with acyclic pentadentate [N3O2] Schiff-base ligands, 2,6-diacetylpyridine bis-(4-methoxybenzoylhydrazone) [H2DAPMBH], or 2,6-diacethylpyridine bis(salicylhydrazone) [H4DAPS], and various apical ligands in different charge states were synthesized: [Er(DAPMBH)(C2H5OH)Cl] (1); [Er(DAPMBH)(H2O)Cl]·2C2H5OH (2); [Er(DAPMBH)(CH3OH)Cl] (3); [Er(DAPMBH)(CH3OH)(N3)] (4); [(Et3H)N]+[Er(H2DAPS)Cl2]− (5); and [(Et3H)N]+[Y0.95Er0.05(H2DAPS)Cl2]− (6). The physicochemical properties, crystal structures, and the DC and AC magnetic properties of 1–6 were studied. The AC magnetic measurements revealed that most of Compounds 1–6 are field-induced single-molecule magnets, with estimated magnetization energy barriers, Ueff ≈ 16–28 K. The experimental study of the magnetic properties was complemented by theoretical analysis based on ab initio and crystal field calculations. An experimental and theoretical study of the magnetism of 1–6 shows the subtle impact of the type and charge state of the axial ligands on the SMM properties of these complexes.

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Structural studies of bis-(2,6-diacetylpyridine-bis-(phenylhydrazone)) and X-ray structure of its Y(III), Pr(III), Sm(III) and Er(III) complex

Cited by 43 publications

References 11 publications

Dissimilar supramolecular organization for the heterotrimetallic assemblage [{LNiLn}{W(CN)8}] with Ln = Y and La (L = Schiff-base derivative)

Dissimilar supramolecular organization for the heterotrimetallic assemblage [{LNiLn}{W(CN)8}] with Ln = Y and La (L = Schiff-base derivative)

Novel Enrofloxacin Schiff Base Metal Complexes: Synthesis, Spectroscopic Characterization, Computational Simulation and Antimicrobial Investigation against Some Food and Phyto-Pathogens

A Series of Novel Pentagonal-Bipyramidal Erbium(III) Complexes with Acyclic Chelating N3O2 Schiff-Base Ligands: Synthesis, Structure, and Magnetism

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