Syntheses, characterizations and structures of NO donor Schiff base ligands and nickel(II) and copper(II) complexes

Şenol, Cemal; Hayvalı, Zeliha; Dal, Hakan; Hökelek, Tuncer

doi:10.1016/j.molstruc.2011.04.037

Cited by 41 publications

(21 citation statements)

References 28 publications

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“…This phenolic moiety was deprotonated upon complexation to form PdL1c. The presence of proton attached to the C=N was detected as a singlet at 8.40 ppm and it shifted upfield to 7.69 ppm upon complexation, as similarly reported by [12]. These suggesting the coordination of azomethine nitrogen and oxygen to the palladium atom.…”

Section: Resultssupporting

confidence: 78%

“…This can be explained by the donation of lone pair of electrons from the nitrogen to the empty d-orbitals of the transition metals, lowering the electron density of the C=N and reducing the energy of the bond. The (C-O) bands in the region 1248-1220 cm -1 of the free ligands shifted to higher wavenumbers of 1221-1318 cm -1 in the complexes, indicating that the phenolic oxygen is also involved in complexation [12]. The appearance of new bands in complexes in the range of 596-598 and 434-494 cm -1 , which have been assigned to the υ(Pd-N) and υ(Pd-O), respectively [14][15].…”

Section: Resultsmentioning

confidence: 95%

“…The strong bands of (C-N) of the ligands appeared at 1630 cm -1 which shifted to lower frequency, 1605-1618 cm -1 upon coordination to metal centers, indicating the involvement of the azomethine nitrogen in the complexation [12][13]. This can be explained by the donation of lone pair of electrons from the nitrogen to the empty d-orbitals of the transition metals, lowering the electron density of the C=N and reducing the energy of the bond.…”

Section: Resultsmentioning

confidence: 98%

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Synthesized and extending the Bidentate Schiff base complexes using multilayer feedforward neural network

Tajuddin

Ismail

Kassim

et al. 2018

J. Fundam and Appl Sci.

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Complexes of Pd(II) and Ni(II) have been synthesized with general composition ML 2 X 2 (M = Pd(II), Ni(II); L = benzylsalicylideneimine and X = OCH 3 , F). All synthesized compounds have been characterized using elemental analysis, magnetic susceptibility measurements, infrared and NMR spectral studies that led to the conclusion that the ligands act as bidentate manner to form square planar geometry for all complexes. As an extending work, the model development of these complexes using multilayer feedforward neural network were performed. NiL1d, PdL1d, NiL1c and PdL1c were fed to the training network as inputs and bacteria as output. Levenberg Marquardt training algorithm was used during the network training with 10 nodes in hidden layer. The results of testing network showed that the regression, R is 1, indicating that the developed model is good.Author Correspondence, e-mail: nurlaila@ieee.org J Fundam Appl Sci. 2017, 9(4S), 952-963 953 This is supported by the small mean square error (MSE) is 1.948x10 -28 at epochs 5. The finding in this study is significant, thus contributed to the design of antibacterial agent especially to the bidentate Schiff base complexes.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Synthesized and extending the Bidentate Schiff base complexes using multilayer feedforward neural network

Tajuddin

Ismail

Kassim

et al. 2018

J. Fundam and Appl Sci.

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“…The magnetic moments of the complexes were in the range of 1.22-1.62 B.M, corresponding to one unpaired electron on the copper (II) center [30] and indicating that the complexes were either in a square planar [31] or octahedral environment [32]. The low values of 1.22 and 1.40 B.M obtained for 2a and 2b are likely to be due to coupling in the Cu-Cu bond.…”

Section: Ir Spectra and Magnetic Studiesmentioning

confidence: 89%

Versatile coordinating capabilities of thiodibenzoic acid copper complexes bearing N-donor ligands

Moosun

Blair

Coles

et al. 2014

Transition Met Chem

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Cu(II) coordination polymers [Cu(tda)(phen)]-1.5H 2 O (1a), [Cu(tda)(py)] (2a) and [Cu(tda)(bipy)(H 2 O)]-0.5H 2 O (3a) (tda = thiodibenzoic acid, phen = phenanthroline, py = pyridine, bipy = bipyridine) have been synthesized by slow diffusion. Under solvothermal conditions, [Cu(tda)(phen)]2H 2 O (1b), [Cu(tda)(H 2 O)] (2b) and[Cu(tda)(bipy)] (3b) were isolated. The structures of the complexes 1a-3a have been determined by single X-ray diffraction. The experimental X-ray powder diffraction patterns of 1b-3b were compared with the calculated patterns of 1a-3a. The polymers were found to exhibit structural and dimensional diversity due to the effect of the co-ligands. In complexes 1a and 1b, tda is found to coordinate with the metal atom in a monodentate mode, while in 2a and 2b, the carboxylate oxygens are coordinated with the two metal centers in a l-bridged bidentate fashion. The structural analysis of 3a shows that the copper atom is in a square pyramidal environment, whereby the metal atom is coordinated with the carboxylate oxygens of two different tda ligands in a monodentate fashion and two nitrogens of the bipyridine ligand and one coordinated water. The IR spectrum of 3b implies a bidentate mode of coordination.

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“…A strong sharp band observed at 1632 cm –1 is attributed to the ν(C=N) group of the ligand 22. Also, the characteristic peak at δ = 8.79 ppm in the 1 H NMR spectrum further confirms the CH=N condensation.…”

Section: Resultsmentioning

confidence: 67%

Transition Metal Complexes with the Schiff Base Ligand 1‐{[2‐(2‐Hydroxyethylamino)ethylimino]methyl}naphthalen‐2‐ol

Niu

Wang

et al. 2012

Zeitschrift anorg allge chemie

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Six transition metal compounds [Cu(H2L)(CH3COO)]·H2O (1), [Cu(H2L)(CH3COO)] (2), [Cu(H2L)](ClO4)·CH3OH (3), 2[Cu(H2L)2] (4), [Co(H2L)2](NO3)·2CH3OH (5), and [Ni(H2L)](NO3) (6) were synthesized by reactions of the Schiff base ligand H3L (1‐{[2‐(2‐hydroxyethyl amino)ethylimino]methyl}naphthalen‐2‐ol) with the corresponding metal salts and characterized by single crystal X‐ray diffraction, elemental analysis, IR and UV/Vis spectroscopy and TG analysis. All compounds are mononuclear molecules, in which the Schiff base ligand exhibits diverse coordination modes and conformations. The N–H···O, O–H···O, and C–H···O inter‐ and intramolecular hydrogen bonding interactions link these molecules into multidimensional network supramolecular structures.

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Syntheses, characterizations and structures of NO donor Schiff base ligands and nickel(II) and copper(II) complexes

Cited by 41 publications

References 28 publications

Synthesized and extending the Bidentate Schiff base complexes using multilayer feedforward neural network

Synthesized and extending the Bidentate Schiff base complexes using multilayer feedforward neural network

Versatile coordinating capabilities of thiodibenzoic acid copper complexes bearing N-donor ligands

Transition Metal Complexes with the Schiff Base Ligand 1‐{[2‐(2‐Hydroxyethylamino)ethylimino]methyl}naphthalen‐2‐ol

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