Preparation and Characterization of Novel Asymmetrical Schiff-Base Ligands Derived from 2-methyl-7-formyl-8-hydroxyquinoline and their Metal Complexes

Salib, Kamal A. R.; Saleh, Akila A.; El-Wafa, Samy Abu; El‐Shafiy, Hoda F.

doi:10.1080/0095897031000069021

Cited by 22 publications

(11 citation statements)

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“…The [Ni(L)] complex has a magnetic moment of 3.72 B.M. as predicted for high spin d 8 systems with two unpaired electrons and in agreement with the values reported for tetrahedral geometry around the nickel(II) ion [34]. The [Cu(L)] complex has a magnetic moment of 1.75 B.M.…”

Section: Magnetic Measurementssupporting

confidence: 85%

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Synthesis, Spectroscopic, and Magnetic Studies of Mono- and Polynuclear Schiff Base Metal Complexes Containing Salicylidene-Cefotaxime Ligand

Anacona

Calvo

Almanza

2013

International Journal of Inorganic Chemistry

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Metal complexes of a Schiff base ligand derived from cefotaxime and salicylaldehyde were prepared. The salicilydene-cefotaxime ligand (H2L) and mononuclear [M(L)] (M(II) = Co, Ni and Cu), dinuclear [Ag2(L)(OAc)2], and tetranuclear metal complexes [M4(L)(OH)6] (M(II) = Ni, Cu) were characterized on the basis of analytical, thermal, magnetic, and spectral studies (IR, UV-visible, 1H NMR, 13C NMR, and EPR). The electronic spectra of the complexes and their magnetic moments suggesttetrahedral geometry for the isolated complexes. The complexes are nonelectrolytes and insoluble in water and common organic solvents but soluble in DMSO.

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Section: Magnetic Measurementssupporting

confidence: 85%

“…typical for high spin d 7 systems with three unpaired electrons. The value observed for this complex is higher than the value expected for square-planar geometry (2.1-2.8) and consistent with the value expected for high spin tetrahedral geometry [34]. The [Ni(L)] complex has a magnetic moment of 3.72 B.M.…”

Section: Magnetic Measurementssupporting

confidence: 79%

Synthesis, Spectroscopic, and Magnetic Studies of Mono- and Polynuclear Schiff Base Metal Complexes Containing Salicylidene-Cefotaxime Ligand

Anacona

Calvo

Almanza

2013

International Journal of Inorganic Chemistry

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“…which is close to the expected value for a five coordinate geometry (3.20-3.40 B.M.) [21]. For [Cu(cefopz) Cl] the experimental magnetic moment measured is equal to 2.22 B.M.…”

Section: Magnetic Measurementssupporting

confidence: 85%

Cefoperazone Metal Complexes: Synthesis and Characterization

Anacona

Bravo

López

2013

J. Chil. Chem. Soc.

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Cefoperazone (Hcefopz) interacts with transition metal(II) ions to give [M(cefopz)Cl] complexes (M = Fe, Co, Ni, Cu and Cd) and [Fe(cefopz)Cl]Cl which were characterized by physicochemical and spectroscopic methods. The spectra indicated that the antibiotics act as monoanionic multidentate NO 3 chelating agent towards metal ions, via the amides, and carboxylate and N-azomoiety. The complexes are non-toxic, insoluble in water and common organic solvents and probably have polymeric structures.

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“…The complexes show magnetic moment values of 5.50 and 5.91 BM corresponding to five unpaired electrons expected for Mn(II) and Fe(III) complexes; 4.89, 3.02, and 1.98 BM corresponding to three, two, and one unpaired electrons expected for Co(II), Ni (II), and Cu(II) complexes, respectively. 26 The electronic spectra of the metal complexes showed absorption bands at 270-283 nm (37,037-35,336 cm −1 ), which are characteristic of the phosphazo four-membered ring. 8 The reflectance spectra of Mn(II) and Fe(III) complexes 1 and 5 display one weak band at 23,474 cm −1 for Mn(II) complex (1) and 21,186 cm −1 for Fe(III) complex (5).…”

Section: Magnetic Properties and Electronic Spectramentioning

confidence: 99%

Metal Complexes of Phosphorus Compounds Including Indigoid Structure: Synthesis, Characterization, and Biological Study

El–Wahab

Faheim

2009

Phosphorus, Sulfur, and Silicon and the Related Elements

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Interaction of hexachlorocyclodiphosph(V)azanes, (I a−h ) with 5,5 indigodisulfonic acid disodium salt (II) furnished the expected cyclodiphosph(V)azanes of the type (H 2 L 1 -H 2 L 8 ). The coordinating behavior of H 2 L 1 , where H 2 L 1 is 1M = Mn(II) and Co(II) (x = 2, n = 6, z = 1); M = Ni(II) (x = 2, n = 6, z = 1.5); M = Cu(II) (x = 2, n = 2, z = nil); M = Fe(III) (x = 4, n = 4, z = 4) and (L 1 ) = the deprotonated form of cyclodiphosphazane ligand. The molar conductance data show that all complexes are non-electrolytes. The spectral data and magnetic susceptibility measurements revealed that the ligand behaves as a dibasic tetradentate ligand coordinated to the metal ions through heterocyclic nitrogen and carbonyl oxygen atoms in an octahedral and square planar manner. Some ligand field parameters (Dq, B, and β), in addition to ligand field stabilization energy (LFSE), were calculated. The thermal behavior of these complexes is studied using TG technique and the different dynamic parameters are calculated applying Coats-Redfern equation. Antimicrobial activities have been studied using the agar-disc diffusion technique, and the higher antimicrobial activity has been observed for the iron (III) complex compared to the other metal complexes.

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Preparation and Characterization of Novel Asymmetrical Schiff-Base Ligands Derived from 2-methyl-7-formyl-8-hydroxyquinoline and their Metal Complexes

Cited by 22 publications

References 0 publications

Synthesis, Spectroscopic, and Magnetic Studies of Mono- and Polynuclear Schiff Base Metal Complexes Containing Salicylidene-Cefotaxime Ligand

Synthesis, Spectroscopic, and Magnetic Studies of Mono- and Polynuclear Schiff Base Metal Complexes Containing Salicylidene-Cefotaxime Ligand

Cefoperazone Metal Complexes: Synthesis and Characterization

Metal Complexes of Phosphorus Compounds Including Indigoid Structure: Synthesis, Characterization, and Biological Study

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