scholarly journals Spectroscopic characterization and cytotoxic activity of new metal complexes derived from (1E, N'Z, N'Z)-N',N'-bis(2-hydroxybenzylidene)-2-(naphthalen-1-yloxy) acetohydrazonohydrazide.

2015 ◽  
Vol 11 (9) ◽  
pp. 3888-3918
Author(s):  
Abduo S. El-Tabl ◽  
M. M. Abd-El Wahed ◽  
M. A. Wahba
Keyword(s):  
Metal Complexes ◽  
Metal Ion ◽  
Thermal Analyses ◽  
Covalent Bond ◽  
Spectroscopic Characterization ◽  
Esr Spectra ◽  
Mass Spectral ◽  
Phenolic Oxygen ◽  
Elemental Analyses ◽  
Bond Character

Spectroscopic (IR, 1H-NMR, UV-visible, mass and ESR spectra) and structural studies of the ligand (1E, N'Z, N'Z)-N', N'-bis (2-hydroxybenzylidene)-2-(naphthalen-1-yloxy) acetohydrazonohydrazide (H2L) and its metal complexes are reported. The magnetic properties and thermal analyses (DTA and TGA) were also carried out. The IR spectra of the prepared complexes suggested that, the ligand adopted either a bidentate or a tetradentate fashion, bonding to the metal ion through the azomethine nitrogens and the two phenolic oxygen atoms (ONNO). Electronic spectra and magnetic susceptibility measurements revealed an octahedral geometry for all complexes except sliver(I) complex (6), copper(II) complex (7) and cobalt(II) complex (11). The elemental analyses and mass spectral data have justified the ML, ML2 and M3L composition of the complexes. The ESR spectra of copper(II) complexes (5), (7), (12) and (16), showed an axial type (dx2-y2) ground state with a covalent bond character and also support the suggested structures of complexes. The antimicrobial activity as well as the cytotoxicity of the ligand and its metal complexes were investigated and discussed.

scholarly journals Synthesis, characterization and spectroscopic properties of some 2-substituted 1,3-indandiones and their metal complexes

2009 ◽  
Vol 7 (3) ◽  
pp. 429-438 ◽  
Author(s):  
Anife Ahmedova ◽  
Vasil Atanasov ◽  
Petja Marinova ◽  
Neyko Stoyanov ◽  
Mariana Mitewa
Keyword(s):  
Metal Complexes ◽  
Optical Sensors ◽  
Metal Ion ◽  
Spectroscopic Properties ◽  
Mass Spectral Fragmentation ◽  
Enolic Form ◽  
1H And 13C Nmr ◽  
Mass Spectral ◽  
Elemental Analyses ◽  
Ft Ir

AbstractNew 2-acyl-1,3-indandione derivatives, compounds 1–4, were obtained by condensation of 2-acetyl-1,3-indandione with benzaldehyde, thiophene-2-aldehyde, thiophene-3-aldehyde and furane-2-aldehyde, respectively. The structures of the newly synthesized 2-substituted 1,3-indandiones were characterized by means of spectroscopic methods (FT-IR, 1H and 13C NMR, UV-Vis and MS). Based on the obtained results it is suggested that the compounds exist in the exocyclic enolic form. Mass spectral fragmentation paths are also proposed. In order to verify the possibility for tautomerization processes of the newly synthesized compounds their absorption spectra were recorded in various solvents. Furthermore, the complexation properties of the compounds with metal(II) ions were also studied. A series of non-charged complexes with Cu(II), Cd(II), Zn(II), Co(II) and Ni(II) was isolated and analyzed by elemental analyses and IR. The paramagnetic Cu(II) complexes were studied by EPR and distorted, flattened tetrahedral structures are predicted. The other metal complexes show the presence of water molecules, most probably coordinated to the metal ion, thus forming octahedral geometry. Ultimately, the studied properties of the newly synthesized compounds, 1–4, suggest that they may find application as extracting agents for metal ions, rather than as optical sensors.

scholarly journals Organic Amino Acids Chelates; Preparation, Spectroscopic Characterization and Applications as Foliar Fertilizers

2014 ◽  
Vol 10 (2) ◽  
pp. 2203-2217
Author(s):  
Abduo S. El-Tabl ◽  
S. El-Kousy ◽  
M. A. Wahba ◽  
S. M. Khalefa
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Magnetic Moments ◽  
Thermal Analyses ◽  
Total Yield ◽  
Electrical Conductance ◽  
Covalent Bond ◽  
Spectroscopic Characterization ◽  
Esr Spectra ◽  
Foliar Fertilizer

Cu(II) complexes of amino acid hydrolyzate soya protein isolate have been prepared. In order to study the mode of coordination in the above chelates and their effect as foliar fertilizer, Mn(II), Co(II), Nil(II), Cu(II), Zn(II) and Cd(II) complexes of  L-mino acids have been prepared and characterized by elemental and spectral analyses,( IR, UV-VIS, mass spectra and ESR), electrical conductance, magnetic moments and thermal analyses (DTA and TGA). ESR spectra of copper (II) complexes show isotropic and anisotropic types d(x2-y2) with covalent bond character. The amino acids chelates were evaluated as foliar fertilizer by treating plants with micronutrient, amino acid solutions and varying concentrations of micronutrient amino acids chelats. It was found that spraying plant with 2.5% micronutrient amino acids chelats gives the best results regarding: plant height, stem diameter, leaves area, number of flowers, number of branches per plants and total yield per plant.

scholarly journals Synthesis and Spectroscopic Characterization for Some Metal ion Complexes with 2-Hydroxy-3-((5-Mercapto-1,3,4-Thiadiazol-2-yl)Diazenyl)-1-Naphthaldehyde

2016 ◽  
Vol 13 (2) ◽  
pp. 105-114
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
Metal Ion ◽  
Mass Spectra ◽  
Spectroscopic Characterization ◽  
Bidentate Ligand ◽  
Molar Ratio ◽  
Theoretical Treatment ◽  
Spectroscopic Techniques ◽  
Metal Ion Complexes ◽  
Square Planar

New metal ion complexes were synthesized with the general formula; K[PtLCl4], [ReLCl4] and K[ML(Cl)2] where M = Pd(II), Cd(II), Zn(II) and Hg(II), from the Azo ligand (HL) [2-Hydroxy-3-((5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl)-1-naphth aldehyde] (HL) the ligand was synthesized from (2-hydroxy-1-naphthaldehyde) and (5-amino-1,3,4-thiadiazole-2-thiol). The ligand and its metal complexes are characterized by phisco- chemical spectroscopic techniques (FT.IR, UV-Vis and Mass spectra, elemental analysis, molar conductivity, Atomic Absorption, Chloride contain and magnetic susceptibility). The spectral data suggest that the (HL) behaves as a bidentate ligand in all complexes. These studies revealed tetrahedral geometries for all metal complexes, except square planar for Pd(II) complex and except octahedral geometry for Pt(IV) and Re(V) complexes. The study of complexes formation via molar ratio of (M:L) as (1:1). Theoretical treatment of this ligand and its metal complexes in gas phase using Hyper chem.8 was preformed.

scholarly journals Synthesis Characterization and Antimicrobial Activity Studies of Some Transition Metal Complexes Derived from 3-Chloro-N′-[(1E)-(2-hydroxy phenyl)methylene]-6-methoxy-1-benzothiophene-2-carbohydrazide

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Vivekanand D. Biradar ◽  
B. H. M. Mruthyunjayaswamy
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Esr Spectra ◽  
Mass Spectral Data ◽  
Tetrahedral Geometry ◽  
Donor Ligand ◽  
Mass Spectral ◽  
E Coli ◽  
H Nmr

A series of new coordination complexes of Cu(II), Co(II), Ni(II), Zn(II), Hg(II), Mn(II), and Fe(III) with the Schiff base 3-chloro-N′-[(1E)-(2-hydroxy phenyl)methylene]-6-methoxy-1-benzothiophene-2-carbohydrazide (HL) have been synthesized and characterized by elemental analysis, electrical conductivity measurements, IR spectra,1H NMR, mass spectral data, electronic spectra, magnetic susceptibility, ESR spectra, TGA, and Powder XRD data. The Schiff base behaves as tridentate ONO donor ligand and forms the complexes of the type ML2(metal-ligand) stoichiometry for Cu(II), Co(II), Ni(II), and Mn(II) complexes and ML stoichiometry for Zn(II), Hg(II), and Fe(III) complexes. All the complexes are colored and nonelectrolytes. It is found that Cu(II), Co(II), Ni(II), Mn(II) and Fe(III) complexes have exhibited octahedral geometry whereas Zn(II) and Hg(II) complexes exhibited tetrahedral geometry. The ligand and its metal complexes have been screened for their antibacterial activity againstE. coliandS. aureusand antifungal activity againstA. nigerandA. flavus.

Synthesis and Characterization of Palladium(II) Complexes with Substituted Dihydrobenzoimidazo Quinazoline Derivatives

2017 ◽  
Vol 13 (2) ◽  
pp. 1-15
Author(s):  
Rita Bhattacharjee Virupaiah Gayathri
Keyword(s):  
Metal Ion ◽  
Synthesis And Characterization ◽  
Planar Geometry ◽  
Conductivity Measurements ◽  
Spectral Techniques ◽  
Mass Spectral ◽  
Square Planar ◽  
Elemental Analyses ◽  
Quinazoline Derivatives

A series of palladium(II) halo complexes of the types [PdX 2 L 2 ].nH 2 O {n = 0, X = Cl, L = L 2 , L 4 and L 5 ; X = Br, L = L 2 ; n = 1, X = Cl, L = L 1 and L 3 } and Pd 2 X 4 L 3 [X = Br, L = L 1 , L 3 , L 4   and L 5 ] were prepared where L is 6-R-5,6- dihydrobenzoimidazo quinazoline (R-Diq; where R = ethyl: L 1 / n or i-propyl: L 2 , L 3 / n or i-butyl: L 4 , L 5 ) and characterized by elemental analyses, conductivity measurements, TGA, infrared, electronic, NMR and mass spectral techniques. Based    on these studies monomeric/dimeric structure with a square planar geometry around the metal ion was proposed for all the complexes. Some of the complexes were investigated for anti-microbial activity.

Synthesis, Characterisation and Antimicrobial Activity of Manganese(II), nickel(II), cobalt(II), Copper(II) and Zinc(II) Complexes of a Binucleating Tetradentate Ligand

2002 ◽  
Vol 2002 (11) ◽  
pp. 529-531 ◽  
Author(s):  
Abdou Saad El-Tabl
Keyword(s):  
Antimicrobial Activity ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Magnetic Moment ◽  
Thermal Analyses ◽  
Antimicrobial Activities ◽  
Esr Spectra ◽  
Tetradentate Ligand ◽  
Tetradentate Schiff Base ◽  
Elemental Analyses

The binucleating, tetradentate Schiff base ligand (H2L) has been synthesised by condensation of bis-(4-aminophenyl)-methane with salicyladehyde. The resulting metal(II) complexes [metal = Mn||, Ni||, Co||, Cu|| and Zn||] have been characterised by elemental analyses, molar conductances, magnetic moment, IR, UV-vis spectra, thermal analyses (DTA and TGA) and ESR spectra. Antimicrobial activities of the ligand and its metal(II) complexes have been tested against different microorganisms. The electrochemical data of complexes (2), (9) and (10) are discussed.

scholarly journals Synthesis, Spectroscopic Characterization and Biological Activities of Transition Metal Complexes Derived from a Tridentate Schiff Base

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
J. Senthil Kumaran ◽  
S. Priya ◽  
N. Jayachandramani ◽  
S. Mahalakshmi
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Metal Ion ◽  
Biological Activities ◽  
Bacterial Species ◽  
Spectroscopic Characterization ◽  
Structural Features ◽  
Fungal Species ◽  
Spectral Studies ◽  
Central Metal

A new series of Cu (II), Ni (II), Co (II) and Zn (II) complexes have been synthesized from the Schiff base derived from 4-hydroxy-3-methoxybenzylidine-4-aminoantipyrine and 2-aminophenol. The structural features have been determined from their elemental analysis, magnetic susceptibility, molar conductance, Mass, IR, UV-Vis,1H-NMR,13C-NMR and ESR spectral studies. The redox behavior of the copper complex has been studied by cyclic voltammetry. The data confirm that the complexes have composition of ML2type. The electronic absorption spectral data of the complexes propose an octahedral geometry around the central metal ion. All the metal complexes with DNA structure were guided by the presence of inter-molecular C–HO and C–HN hydrogen bonds. The biological activity of the synthesized compounds were tested against the bacterial species such asBacillus subtilis, Staphylococcus aureus, Proteus vulgarisand fungal species such asCandida albicansby thewell-diffusionmethod.

scholarly journals Preparation and Characterization of Di-, Tri-, and Tetranuclear Schiff Base Complexes Derived from Diamines and 3,4-Dihydroxybenzaldehyde

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Ahlam Jameel Abdulghani ◽  
Asmaa Mohammed Noori Khaleel
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Copper Complex ◽  
Condensation Reaction ◽  
Magnetic Moments ◽  
Thermal Analyses ◽  
Schiff Base Complexes ◽  
Conductivity Measurements ◽  
Elemental Analyses

A series of new di-, tri-, and tetranuclear Co(II) and Cu(II) complexes of three new diSchiff base ligands were synthesized by two different methods. The first method involved the synthesis of the three ligands from condensation reaction of 3,4-dihydroxybenzaldehyde (L′H2) with ethylenediamine (en), o-phenylenediamine (o-PD), or 4,5-dimethyl-1,2-phenylendiamine (DMPD) in a mole ratio of 2 : 1 followed by the reaction of the resulting Schiff bases ligands with Cu(II) or Co(II) ions in the presence of 2,2′-bipyridyl (L) to form the di- and trinuclear metal complexes. The second method involved the condensation of the copper complexLCu(II)L′(L = 2,2′-bipyridyl, L′ = 4-formylbenzene-1,2-bis(olate)) with en, o-PD, or DMPD in a mole ratio of 2 : 1, respectively, followed by reaction with CuCl2or Cu(ClO4)2to form di-, tri-, and tetranuclear copper (II) complexes, respectively. The structures of the ligands and metal complexes were characterized by elemental analyses, NMR, and FTIR spectra. The geometries of metal complexes were suggested according to elemental analysis, electronic spectra, thermal analyses, atomic absorption, and magnetic moments and conductivity measurements.

scholarly journals Synthesis, Spectroscopic Characterization, and In Vitro Antimicrobial Studies of Pyridine-2-Carboxylic Acid N′-(4-Chloro-Benzoyl)-Hydrazide and Its Co(II), Ni(II), and Cu(II) Complexes

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jagvir Singh ◽  
Prashant Singh
Keyword(s):  
Metal Complexes ◽  
Acid Hydrazide ◽  
Spectroscopic Characterization ◽  
Fungal Species ◽  
Molar Conductance ◽  
Antimicrobial Studies ◽  
Spectral Bands ◽  
Elemental Analyses ◽  
Solid Complexes

N-substituted pyridine hydrazide (pyridine-2-carbonyl chloride and 4-chloro-benzoic acid hydrazide) undergoes hydrazide formation of the iminic carbon nitrogen double bond through its reaction with cobalt(II), nickel(II), and copper(II) metal salts in ethanol which are reported and characterized based on elemental analyses, IR, solid reflectance, magnetic moment, molar conductance, and thermal analysis (TG). From the elemental analyses data, 1 : 2 metal complexes are formed having the general formulae [MCl2(HL)2] ·yH2O (where M = Co(II), Ni(II), and Cu(II),y= 1–3). The important infrared (IR) spectral bands corresponding to the active groups in the ligand and the solid complexes under investigation were studied. IR spectra show that ligand is coordinated to the metal ions in a neutral bidentate manner with ON donor sites. The solid complexes have been synthesized and studied by thermogravimetric analysis. All the metal chelates are found to be nonelectrolytes. From the magnetic and solid reflectance spectra, the complexes (cobalt(II), nickel(II), and copper(II)) have octahedral and square planner geometry, respectively. The antibacterial and antifungal activity’s data show that the metal complexes have a promising biological activity comparable with the parent ligand against bacterial and fungal species.

scholarly journals Synthesis, Characterization and Antibacterial Activity Study of Cobalt(II), Nickel(II), Copper(II), Palladium(II), Cadmium(II) and Platinum(IV) Complexes with 4-Amino-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazole-3-thione

2021 ◽  
Vol 21 (6) ◽  
pp. 1514
Author(s):  
Waleed Abbas Jawad ◽  
Asim Alaa Abd Al-Hussein Balakit ◽  
Mahmoud Najim Abid Al-Jibouri
Keyword(s):  
Antibacterial Activity ◽  
Metal Complexes ◽  
Thermal Analyses ◽  
Free Ligand ◽  
Molar Conductance ◽  
Bidentate Ligand ◽  
Ring Closure ◽  
Tetrahedral Geometry ◽  
Visible Spectra ◽  
Elemental Analyses

New transition metal complexes of cobalt(II), nickel(II), copper(II), palladium(II), cadmium(II), and platinum(IV) with bidentate ligand 4-amino-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazole-3-thiol were synthesized and characterized by microelemental analyses (CHNS), Fourier-transform infrared (FT-IR), UV-Visible spectra, molar conductance, magnetic susceptibility and thermal analyses (TG-DSC). The ligand was synthesized by ring closure of potassium-2-(3,4,5-trimethoxybenzoyl) hydrazine carbodithioate with an excess amount of hydrazine, and then was acidified using hydrochloric acid. The ligand was used as Lewis bases to prepare metal complexes through the reaction of ratio (1:2) metal:ligand. The ligand was characterized by 1H-NMR and 13C-NMR and the previously described methods to identify the complexes. The results obtained from spectra and elemental analyses indicated the tetrahedral geometry around Cd(II) ion, square-planar for Cu(II) and Pd(II), and octahedral geometry around Co(II), Ni(II), and Pt(IV). All the metal complexes showed significant antibacterial activity in comparison with the free ligand. The antibacterial test of the platinum(IV) complex showed higher activity than other metal complexes against bacteria Staphylococcus aureus (G-positive) and Escherichia coli (G-negative).

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