Synthesis and Characterization of a Novel Unsymmetrical Tetradentate Schiff Base Complex of Zinc(II) Derived from N,N′-bis (5-Bromosalicylidene) 2,3-Diaminopyridine (H2L): Crystal Structure of [Zn(II)L]Pyridine

Ouari, Kamel; Ourari, Ali; Weiss, Jean

doi:10.1007/s10870-010-9749-z

Cited by 23 publications

(16 citation statements)

References 56 publications

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“…For the aromatic protons 6H arom , belonging to the benzenic rings, they are observed as multiplet, centrated at 6.880 ppm whereas, the two methyl groups 2(CH 3 ) appear as singlet at 2.183 ppm and finally the ethylene group (N-CH 2 -CH 2 -N) bridging the two salicylaldehyde moieties resonates at 3.431 ppm. Thus, it can be noted that these results corroborate perfectly to the proposed molecular structure for the nickel complex and agree with the analogous structures reported in the literature [35,42].…”

Section: Spectroscopic Datasupporting

confidence: 92%

Synthesis and spectral analysis of N-substituted pyrrole salicylaldehyde derivatives-electropolymerization of a new nickel(II)-Schiff base complex derived from 6-[3′-N-pyrrolpropoxy]-2-hydroxyacetophenone and 1,2-diaminoethane

Ourari

Aggoun

2015

J IRAN CHEM SOC

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parameters such as the nature of the electrode material, the number of voltammetric scans, and the scan rate dependence. The electrodeposited poly(pyrrole) films onto ITO surface was characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). This poly(pyrrole) matrix, containing metallic centers, was found to have good catalytic properties towards the reduction of iodobenzene and carbon dioxide CO 2 . Graphical abstractAbstract Three dihydroxylated acetophenone derivatives 2,6-(1a), 2,5-(2a), and 2,4-dihydroxyacetophenone (3a) were O-monoalkylated at moderate temperature (50 °C) using 3-bromopropyl-N-pyrrole. These monomers 6-(3′-N-pyrrolpropoxy)-2-hydroxyacetophenone (1b), 5-(3′-N-pyrrolpropoxy)-2-hydroxyacetophenone (2b), and 4-(3′-N-pyrrolpropoxy)-2-hydroxy acetophenone (3b) were isolated with acceptable yields (59-70 %). Their characterization was carried out with usual spectroscopic methods such as UV-vis, FTIR, NMR 1 H, 13 C, Dept135, and elemental analysis. These pyrrolic compounds were deliberately chosen as electropolymerizable monomers to elaborate poly(pyrrole) films containing metallic centers useful as redox mediators covalently grafted on the surfaces of modified electrodes. Accordingly, we have initiated the synthesis of an original pyrrole-Ni(II)-Schiff base complex derived from 2,6-(1b) and 1,2-diaminoethane. This pyrrolic complex was electropolymerized onto glassy carbon (GC), platinum disk (Pt), and indium tin oxide (ITO) electrode surfaces. This electropolymerization was performed in acetonitrile via anodic oxidation of pyrrolic moieties by cyclic voltammetry. The efficiency of the electrochemical polymerization was investigated as a function of several * Djouhra Aggoun

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Section: Spectroscopic Datasupporting

confidence: 92%

Synthesis and spectral analysis of N-substituted pyrrole salicylaldehyde derivatives-electropolymerization of a new nickel(II)-Schiff base complex derived from 6-[3′-N-pyrrolpropoxy]-2-hydroxyacetophenone and 1,2-diaminoethane

Ourari

Aggoun

2015

J IRAN CHEM SOC

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“…Schiff base ligands are currently applied in coordination chemistry for the synthesis of transition metal complexes (Merzougui et al, 2016;Ourari et al, 2008;Ouari et al, 2010Ouari et al, , 2015Majumder et al, 2009;Salavati-Niasari et al, 2008). A literature survey revealed that this kind of compound possesses diverse biological activities such as antianxiety, antidepressant (Jubie et al, 2011) and anti-tumor, antibacterial, and fungicidal properties (Refat et al, 2008;Kannan & Ramesh, 2006).…”

Section: Structure Descriptionmentioning

confidence: 99%

2,2′-[(1E,1′E)-1,2-Phenylenebis(azanylylidene)bis(methanylylidene)]bis(4-bromophenol)

Dekar¹,

Bendia²,

Ouari³

2017

IUCr Data

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In the title compound, C20H14Br2N2O2, there are two intramolecular O—H...N hydrogen bonds formingS(6) ring motifs. The outer benzene rings are inclined to the central benzene ring by 39.09 (11) and 24.31 (11)°, and to one another by 37.12 (11)°. In the crystal, molecules are linked by a short Br...O contact [3.1307 (19) Å], forming zigzag chains propagating along thea-axis direction. The chains are linked by weak offset π–π interactions [intercentroid distance = 3.716 (1) Å], forming layers parallel to theacplane.

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“…They crystallize as biszwitterionic compounds with strong intramolecular N-HÁ Á ÁO hydrogen bonds, forming S(6) ring motifs. Such compounds are of interest because the azomethine C N and C-O groups form stable transition metal complexes by coordinating through the nitrogen and oxygen atoms (Ouari et al, 2010(Ouari et al, , 2015d Fig. 1).…”

Section: Structure Descriptionmentioning

confidence: 99%

1,1′-{(1E,1′E)-[Octane-1,8-diylbis(azanylylidene)]bis(methanylylidene)}bis(naphthalen-2-ol) in the zwitterionic form

2017

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The title compound, C30H32O2N2, is formed from two units ofortho-hydroxynaphthaldehyde bridged with 1,8-diaminooctane. In the solid state, it exists as a double zwitterion. The N atoms are protonated and the C—O−bonds lengths are 1.265 (2) Å, with intramolecular N—H...O hydrogen bonds formingS(6) ring motifs. The molecule has twofold rotational symmetry, with the twofold axis bisecting the central –CH2—CH2– bond of the bridging octane chain. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains propagating along the [-201] direction. The chains are linkedviaC—H...O hydrogen bonds, forming a supramolecular three-dimensional framework structure.

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Synthesis and Characterization of a Novel Unsymmetrical Tetradentate Schiff Base Complex of Zinc(II) Derived from N,N′-bis (5-Bromosalicylidene) 2,3-Diaminopyridine (H2L): Crystal Structure of [Zn(II)L]Pyridine

Cited by 23 publications

References 56 publications

Synthesis and spectral analysis of N-substituted pyrrole salicylaldehyde derivatives-electropolymerization of a new nickel(II)-Schiff base complex derived from 6-[3′-N-pyrrolpropoxy]-2-hydroxyacetophenone and 1,2-diaminoethane

Synthesis and spectral analysis of N-substituted pyrrole salicylaldehyde derivatives-electropolymerization of a new nickel(II)-Schiff base complex derived from 6-[3′-N-pyrrolpropoxy]-2-hydroxyacetophenone and 1,2-diaminoethane

2,2′-[(1E,1′E)-1,2-Phenylenebis(azanylylidene)bis(methanylylidene)]bis(4-bromophenol)

1,1′-{(1E,1′E)-[Octane-1,8-diylbis(azanylylidene)]bis(methanylylidene)}bis(naphthalen-2-ol) in the zwitterionic form

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