A5071260812- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal complexes synthesis and properties
- Magnetism in coordination complexes
- Crystal structures of chemical compounds
- Lanthanide and Transition Metal Complexes
- Inorganic and Organometallic Chemistry
- Crystallography and molecular interactions
- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis and biological activity
- Metal-Organic Frameworks: Synthesis and Applications
- Organometallic Compounds Synthesis and Characterization
- Metal-Catalyzed Oxygenation Mechanisms
- Chemical Thermodynamics and Molecular Structure
- Organometallic Complex Synthesis and Catalysis
- Molecular Sensors and Ion Detection
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Synthesis and Reactions of Organic Compounds
- Synthesis and Biological Evaluation
- Radiopharmaceutical Chemistry and Applications
- Thermal and Kinetic Analysis
- Molecular Junctions and Nanostructures
- Free Radicals and Antioxidants
- Radioactive element chemistry and processing
- Chemical Reaction Mechanisms
Cheikh Anta Diop University
2003-2024
Université Alioune Diop de Bambey
2018-2024
Université Clermont Auvergne
2010
Centre National de la Recherche Scientifique
2009-2010
Institut de Chimie de Strasbourg
2009
Laboratoire de Chimie de Coordination
2009
Université de Strasbourg
2009
University of Nouakchott Al Aasriya
2001
The reactions of the Schiff base 2,2’-[(2-hydroxypropane-1,3-diyl) bis-(imino-methane diyl)] bis-(4-bromophenol) (H3L), with metal transition ions (Mn(II), Ni(II), Cu(II), Zn(II), and Cd(II),) afforded one type complex formulated as [M(HL)(H2O)2].nH2O. These compounds have been characterized by elemental analysis, UV–Vis, FTIR, 1H 13C NMR spectroscopies, molar conductivity room temperature magnetic measurements. structure nickel (II) has determined X-ray crystallography. crystallizes in...
Abstract Following the discovery of an unprecedented transamination reaction between primary alkylamines and a quinonoid molecule type [C 6 H 2 ([pb2]NHCH R) ([pb2]O) ] ( 1 ), obtained from commercially available diaminoresorcinol · 2HCl, we have extended this method to use arylamines, found that, in contrast, secondary amines led different outcome. Whereas functionalized molecules , which are best described as 6π + zwitterions, were with aniline or 4‐methoxyaniline, no transmination was...
The ligand 2,6-bis-(salicylaldehydehydrazone)-4-chlorophenol (H5L) and its binuclear lanthanide(III) nitrate complexes {[Ln2(H4L)3(NO3)](NO3)2.mH2O} where Ln = La, Ce, Pr, Nd, Sm, Gd, Dy, Er, Yb Y, have been synthesized. were characterized by chemical analysis, conductance, magnetic moment measurements infrared spectra. Infrared study indicates that the behaves both as neutral ionic O donors N donors. KEY WORDS: Lanthanide(III) complexes, Schiff base,...
In the title complex, [Cu(C(9)H(9)N(2)O(2))Cl]·2H(2)O, prepared from Schiff base ligand N'-(2-hydroxy-benzil-idene)aceto-hydrazide and copper(II) chloride, Cu(II) atom is coord-inated by two O atoms one N a Cl in distorted square-planar geometry. The donor of tridentate are trans arrangement. crystal structure, there an extensive inter-molecular hydrogen-bonding network; N-H⋯O, O-H⋯O O-H⋯Cl inter-actions, involving uncoordinated water mol-ecules, lead to formation two-dimensional network...
The coordination chemistry towards the M(II) metal centre (M = Mn, Ni, Cu or Zn) of hydrazone ligand (E)-2-amino-N’-[1-(pyridin-2-yl)ethylidene]benzohydrazide (H3L) has been explored and complexes having formulae [Mn(H2L)2] (1), {[Ni(H2L)2].DMF.0.4H2O} (2), {[Cu2(H2L)2(µ-Cl)2].DMF} (3) [Zn(H2L)2] (4) have isolated characterized by IR, UV-Visible spectroscopy, elemental analysis X-ray crystal diffraction. Structural studies reveal that mononuclear (2) adopt highly distorted octahedral...
Reaction of the 2,6-diformyl-4-chlorophenol-bis-(2'-hydroxy-benzoylhydrazone) with Ln(NO3)3.nH2O (n = 5 or 6 and Ln Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Er Yb) produces homobinuclear complexes. These complexes have been characterized by analysis, molar conductance, magnetic measurements, infrared spectral studies X-ray diffraction. The analytical data showed 1:3 (metal:ligand) stoichiometry. Molar conductance measurements in dmf indicate electrolytes all cases. Magnetic moment values are close...
The use of N'–(1–(pyridin–2–yl)ethylidene)nicotinohydrazide (HL) in lanthanide(III) chemistry has yielded one mononuclear and dinuclear complexes. 1:1 Nd(NO3)3.6H2O or Pr(CH3COO)3.6H2O/HL methanol afforded the complexes [Nd (HL)2(NO3)2(H2O)2].(NO3) (1) {[Pr(L)(h2–OOCCH3)(H2O)](h1:h2:m–OOCCH3)2[Pr (L)(h2–OOCCH3)(H2O)]} (2). structures were solved by single crystal X–ray crystallography. In complex, Nd3+ atom is coordinated two neutral molecules ligand acting tridentate fashion, nitrate anions...
The title cocrystal, [Cu(2)(C(2)O(4))(NO(3))(2)(C(7)H(9)N(3))(2)(H(2)O)(2)][Cu(2)(C(2)O(4))(NO(3))(2)(C(7)H(9)N(3))(2)(CH(4)O)(2)], is a 1:1 cocrystal of two centrosymmetric Cu(II) complexes with oxalate dianions and Schiff base ligands. In each mol-ecule, the centre in distorted octa-hedral cis-CuN(2)O(4) environment, donor atoms N,N'-bidentate ligand bridging O,O'-bidentate group lying equatorial plane. one monodentate nitrate anion water mol-ecule occupy axial sites, other, methanol these...
The reactions of the Schiff base 2-((2-hydroxyphenylimino)methyl)-6-methoxyphenol (H2L), obtained by direct condensation 2-aminophenol and 2-hydroxy-3-methoxybenzaldehyde, with some transition metal ions (Mn(II), Co(II), Ni(II), Cu(II) Zn(II)) afforded complexes general formulae [M2(L)2(solvent)x] (M: Mn, Co, Ni, Cu or Zn; Solvent: DMSO H2O). These compounds were characterized elemental analysis, UV-Vis, IR, 1H- 13C-NMR spectroscopies, molar conductivity room temperature magnetic...
Two Cu II complexes [Cu(C 14 H 13 N 4 O 2 )Cl] n , I and [Cu (C 8 10 NO ) Cl ] have been synthesized. In the structure of mononuclear complex each ligand is coordinated to two metal centers. The basal plane around cation formed by one chloride anion, oxygen atom, imino pyridine nitrogen atom. apical position distorted square-pyramidal geometry occupied a atom from neighbouring unit, leading infinite one-dimensional polymeric chains along b- axis direction. Each chain connected adjacent...
Schiff bases have often been used as chelating ligands in the field of coordination chemistry, and their metal complexes extensively investigated due to potential applications. It is known that reactions N,N,O,O-donor with transition ions produced series interesting structures magnetic properties. A new complex prepared by reaction 2,2'-{propane-1,2-diyl-bis[nitrilo(E)methylidene]}bis(6-methoxyphenol) (H2L) Co(III) ion reported this paper. The bicompartmental ligand acts a tetradentate...
Six news dinuclear metal transition (Mn(II) (1), Fe(II) (2), Co(II) (3), Ni(II) (4), Cu(II) (5) and Zn(II) (6)) complexes have been synthesized from a new hexadentate Schiff base N’1,N’4-bis(1-(pyridin-2-yl)ethylidene)succinohydrazide (H2L). The ligand was characterized by elemental analysis, FTIR, UV-visible, 1H NMR 13C NMR. synthetized compounds investigated FTIR UV-visible spectroscopies, molar conductance room temperature magnetic moments measurement. results show that the 1-6 are...
The reactions of the Schiff base E-1-(benzo[d]thiazol-2-yl)-2-(1-(2-methoxyphenyl) ethylidene) hydrazine (HL), with metal transition ions (Mn(II), Co(II), Ni(II), Cu(II) and Zn(II)), afforded one type complex formulated as [M(HL)(Solv)2Cl]+(Cl-). These compounds have been characterized by elemental analysis, UV-Vis, FTIR, 1H 13C NMR spectroscopies, molar conductivity room temperature magnetic measurements. structure nickel (II) has determined X-ray crystallography. crystallizes in monoclinic...
The reactions of the Schiff base 2,2’-[1,1’-(ethane-1,2-diyl)bis(nitriloethylidyne)]diphenol (H2L), which was synthesised by condensation 2-hydroxyacetophenone and ethylenediamine in 2:1 ratio, with acetate copper (II) Salt, afforded a new mononuclear complex formulated as [Cu(L)].(H2O)0.5. ligand have been characterized elemental analysis, FTIR, UV-Vis 1H 13C NMR spectroscopies. characterization completed molar conductivity room temperature magnetic measurements. structure has resolved...
The present investigation describes the synthesis and structural study of ligand N'-(phenyl(pyridin-2-yl)methylene)nicotinohydrazide (HL), which was used to generate two type complexes formulated as [Ln(HL)2(NO3)2(H2O)].(NO3) (Ln = La (1) Pr (2)) [Ln(HL)2(NO3)(H2O)2].(NO3)2 Nd (3), Sm (4), Gd (5) Tb (6)). are characterized by NMR, UV-Visible FTIR spectroscopies, conductivity measurements room temperature magnetic moment measurements. [La(HL)2(NO3)2(H2O)].(NO3) compound crystallizes in...
Two Schiff bases (H<sub>2</sub>L), derived from o-vanillin and nicotinic hydrazide, its complexes with some lanthanides (Y, Ce, Yb, Pr, Gd Tb) have been synthesized. These compounds characterized by means of elemental analysis, UV–Vis spectroscopy, FTIR <sup>1</sup>H <sup>13</sup>C NMR (for H<sub>2</sub>L), molar conductance room temperature magnetic measurements. The are found isostructural formulated as...
New complexes prepared by the reaction of N,N’-bis(3-methoxysalicylidenimino-1,3-diaminopropane) (H2L) with Ni(II), Zn(II) and Cu(II) ions are reported in this paper. The H2L ligand is structurally characterized elemental analysis, NMR, infrared, UV-Vis spectroscopies, conductance magnetic room temperature measurement. mononuclear complex Ni(II) (C19H24N2NiO6) single X-ray diffraction. compound crystallizes orthorhombic system space group Pnma unit cell parameters a = 7.3754(5) Å, b...