Synthesis and spectroscopic characterization of copper(II) complexes with the polydentate chelating ligand 4,4′-[1,4-phenylenedi(nitrilo)dipente-2-one

Shauib, Nadia M.; Elassar, Abdel‐Zaher A.; El‐Dissouky, Ali

doi:10.1016/j.saa.2005.06.024

Cited by 48 publications

(30 citation statements)

References 26 publications

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“…The singlets for the -COCH 3 group were observed at 5.10 and 5.12 ppm and the singlets for the -CNCH 3 group were observed 1.15 and 1.18 ppm. These data are in agreement with previously reported for similar compounds and confirmed the suggested formulation of the ligands [23,34]. Magnetic studies: The room temperature magnetic moments of the complexes showed that all of the complexes are paramagnetic.…”

Section: Synthesis Of Schiffsupporting

confidence: 92%

“…The molar conductance of the complexes was an aid for proposing their formulas. The values of the molar conductance in DMF in 10 -3 M solutions are in the range 7.8-12.1 ohm -1 cm 2 mol -1 , suggesting a non-electrolytic nature for these complexes [23,31,32].…”

Section: Synthesis Of Schiffmentioning

confidence: 95%

“…These data indicate that the free ligands exist mainly in the ketonic form in the solid state. The appearances of only one band for each of the C=O and C=N groups indicate the symmetrical nature of the free ligands [23].…”

Section: Synthesis Of Schiffmentioning

confidence: 96%

“…Earlier work reported that some drugs showed increased activity when administered as metal complexes rather than as organic compounds [22]. Many dinuclear complexes of Cu(II) with Schiff base ligands have been investigated [6,10,23,24] some of which are biologically relevant; for example, some copper complexes can serve as models for enzymes such as galactose oxidase and may be used as effective oxidant and redox catalysts [25][26][27]. In spite of the diversity in the coordination environment and the structure of these complexes, which depend on the type of Schiff base and the anion.…”

Section: Introductionmentioning

confidence: 99%

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4,4'-(DIPHENYLMETHANE-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE AND 4,4'-(DIPHENYLETHER-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE LIGANDS AND THEIR Ni(II), Cu(II) COMPLEXES: SYNTHESIS, CHARACTERIZATION, DNA CLEAVAGE STUDIES

Karipçin

Özmen

Culu

2012

J. Chil. Chem. Soc.

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The synthesis of two new ligands 4,4'-(diphenylmethane-4,4'-diyldinitrilo)dipentan-2-one (H 2 L 1 ) and 4,4'-(diphenylether-4,4'-diyldinitrilo)dipentan-2-one (H 2 L 2 ) is reported. The ligands have two acetylacetone subunits separated by diphenylmethane or diphenylether group. The ligands form stable dinuclear complexes with Ni(II) and Cu(II) ions. Ligands and their complexes were characterized by elemental analysis, m.p., IR, molar conductivity and magnetic moment measurements. The interaction between these compounds with DNA has also been investigated by agarose gel electrophoresis, we found that the nickel(II) and copper(II) complexes can cleave supercoiled pBR322 DNA to nicked and linear forms. The copper(II) complexes with H 2 O 2 as a cooxidant exhibited the strongest cleaving activity. The free ligands were also characterized by 1 H NMR spectra.

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Section: Synthesis Of Schiffsupporting

confidence: 92%

Section: Synthesis Of Schiffmentioning

confidence: 95%

Section: Synthesis Of Schiffmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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4,4'-(DIPHENYLMETHANE-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE AND 4,4'-(DIPHENYLETHER-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE LIGANDS AND THEIR Ni(II), Cu(II) COMPLEXES: SYNTHESIS, CHARACTERIZATION, DNA CLEAVAGE STUDIES

Karipçin

Özmen

Culu

2012

J. Chil. Chem. Soc.

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“…The broad band for the -OH group at 3317 cm −1 observed in the IR spectra of the free ligand is absent in the IR spectra of their metal complexes, indicating deprotonation of the OH group and formation of M-O bond. This is supported by the appearance of a new band in the region 517-552 cm −1 assigned to ν(M-O) [8,9].…”

Section: Ir Spectramentioning

confidence: 73%

Novel Metal(II) Complexes with Bidentate Schiff Base Ligand: Synthesis, Spectroscopic Properties and Dye Decolorization Functions

2016

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The bidentate Schiff base ligand 4-chloro-2-[1-(4-phenylphenyl)ethylideneamino]phenol and its mononuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes have been synthesized. Ligand and metal complexes were characterized by elemental analyses, magnetic susceptibility, molar conductivity, 1 H-and 13 C-NMR, the Fourier transform infrared, UV-Vis, inductively coupled plasma optical emission spectrometry, and thermogravimetric-differential thermogravimetric studies. The results suggest that the mononuclear complexes have a metal to ligand mole ratio of 1:2 and the metal(II) ions are coordinated with the phenolic oxygen and imine nitrogen atoms. Octahedral structures are proposed for the complexes of the Schiff base ligand. Furthermore, the complexes were checked for their efficiency to decolorize the dye methylene blue. In our experiments we found that metal(II) complexes had an acceptable decolorization efficiency against the dye methylene blue.

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Transition metal complexes of a hydrazone–oxime ligand containing the isonicotinoyl moiety: Synthesis, characterization and microbicide activities

Shakdofa

El‐Saied

Rasras

et al. 2018

Applied Organom Chemis

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Complexes of VO2+, Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Ru3+ and UO22+ with (3‐(hydroxyimino)butan‐2‐ylidene)isonicotinohydrazide were synthesized and characterized using physical and spectral methods. Analytical data revealed that the complexes formed in 1:1 or 1:2 metal–ligand ratios. Spectral studies showed that the ligand bonded to the metal ion in neutral tridentate, monobasic tridentate or monobasic bidentate fashion through azomethine nitrogen atom, protonated/deprotonated imine oxime group and/or ketonic/enolic carbonyl group. From the electronic spectral data together with magnetic susceptibility values a square planar, tetrahedral or distorted octahedral structure can be proposed for all complexes. Electron spin resonance spectra for Cu2+ complexes (2–4) revealed axial symmetry with g|| > g⊥ > ge, indicating distorted octahedral or square planar structures and the unpaired electron exists in a dx2−y2 orbital with marked covalent bond feature. The prepared complexes showed good to excellent biological activity, and the most active complexes against Aspergillus niger were 4 and 9 with zone of inhibition of 25 and 23 mm, respectively. Complexes 10 and 11 showed interesting activity against Escherichia coli with zone of inhibition of 44 and 32 mm, respectively.

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Synthesis and spectroscopic characterization of copper(II) complexes with the polydentate chelating ligand 4,4′-[1,4-phenylenedi(nitrilo)dipente-2-one

Cited by 48 publications

References 26 publications

4,4'-(DIPHENYLMETHANE-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE AND 4,4'-(DIPHENYLETHER-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE LIGANDS AND THEIR Ni(II), Cu(II) COMPLEXES: SYNTHESIS, CHARACTERIZATION, DNA CLEAVAGE STUDIES

4,4'-(DIPHENYLMETHANE-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE AND 4,4'-(DIPHENYLETHER-4,4'-DIYLDINITRILO)DIPENTAN-2-ONE LIGANDS AND THEIR Ni(II), Cu(II) COMPLEXES: SYNTHESIS, CHARACTERIZATION, DNA CLEAVAGE STUDIES

Novel Metal(II) Complexes with Bidentate Schiff Base Ligand: Synthesis, Spectroscopic Properties and Dye Decolorization Functions

Transition metal complexes of a hydrazone–oxime ligand containing the isonicotinoyl moiety: Synthesis, characterization and microbicide activities

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