scholarly journals Synthesis and Characterization of New Schiff Bases Derived from N (1)-Substituted Isatin with Dithiooxamide and Their Co(II), Ni(II), Cu(II), Pd(II), and Pt(IV) Complexes

2009 ◽  
Vol 2009 ◽  
pp. 1-12 ◽  
Author(s):  
Ahlam J. Abdul-Ghani ◽  
Asmaa M. N. Khaleel
Keyword(s):  
Schiff Bases ◽  
Antifungal Agents ◽  
Magnetic Moments ◽  
Thermal Studies ◽  
Chloride Content ◽  
Conductivity Measurements ◽  
Proteus Vulgaris ◽  
Elemental Analyses ◽  
Antibacterial And Antifungal

Three new Schiff bases of N-substituted isatin , and = Schiff base of N-acetylisatin, N-benzylisatin, and N-benzoylisatin, respectively, and their metal complexes , , , , , , , , , , , , and , were reported. The complexes were characterized by elemental analyses, metal and chloride content, spectroscopic methods, magnetic moments, conductivity measurements, and thermal studies. Some of these compounds were tested as antibacterial and antifungal agents againstStaphylococcus aureus, Proteus vulgaris, Candida albicans, and Aspergillus niger.

scholarly journals Ni (II), Cu (II) and Zn (II) Metal Chelates With Some Thiazole Derived Schiff-Bases: Their Synthesis, Characterization and Bactericidal Properties

1999 ◽  
Vol 6 (2) ◽  
pp. 75-80 ◽  
Author(s):  
Zahid H. Chohan
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Schiff Bases ◽  
Magnetic Moments ◽  
Metal Chelates ◽  
Conductivity Measurements ◽  
Octahedral Structure ◽  
Distorted Octahedral ◽  
Bactericidal Properties ◽  
Elemental Analyses

A number of thiazole derived tridentate Schiff-bases (LH) and its metal chelates of the type [M(L)2X] where M=Ni(II), Cu(II) and Zn(II), L=substituted salicylaldehyde (5-H, 5-CH3, 5-OCH3, 5-NO2 and 5-Cl) and X=CI have been synthesized and characterized with the help of elemental analyses, conductivity measurements, magnetic moments, UV-Vis, IR and NMR spectral data. An octahedral structure for Ni(II) and Zn(II) and a distorted octahedral structure for Cu(II) chelates have been proposed. All the Schiff-bases and their metal chelates have been screened for their biological activity against Escherichia coli, Staphylococcus aureous , Pseudomonas aeruginosa and Klebsiella pneumonae and in comparison, the metal chelates have been shown to possess more antibacterial activity than the uncomplexed Schiff-bases.

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 and spectral studies of Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and Cd(II) complexes of a new macroacyclic ligand n,n’-bis(2-benzothiazolyl)-2,6-pyridinedicarboxamide

2006 ◽  
Vol 71 (5) ◽  
pp. 529-542 ◽  
Author(s):  
Kalagouda Gudasi ◽  
Siddappa Patil ◽  
Ramesh Vadavi ◽  
Rashmi Shenoy ◽  
Manjula Patil
Keyword(s):  
Liquid Nitrogen ◽  
Magnetic Moments ◽  
Thermal Studies ◽  
Liquid Nitrogen Temperature ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Conductance Data ◽  
X Band ◽  
Elemental Analyses ◽  
Uv Visible

A new macroacyclic amide ligand N,N?-bis(2-benzothiazolyl)-2,6-pyridinedicarboxamide (BPD), formed by the condensation of 2,6-pyridinedicarbonyldichloride with 2-aminobenzothiazole and its Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and Cd(II) complexes were synthesized. Their structures were elucidated on the basis of elemental analyses, conductance measurements, magnetic moments, spectral (IR, NMR UV-Visible, EPR and FAB) and thermal studies. The complexes exhibit an octahedral geometry around the metal center. Conductance data of the complexes suggested them to be 1:1 electrolytes. The pentadentate behavior of the ligand was proposed on the basis of spectral studies. The X-band EPR spectra of the Cu(II) and Mn(II) complexes in the polycrystalline state at room (300 K) and liquid nitrogen temperature (77 K) were recorded and their salient features are reported.

scholarly journals Synthesis, Spectral, Magnetic and Thermal Studies of the Complexes of CoIIand NiIIWith Some Bidentate and Tridentate Hydrazone Ligands

2005 ◽  
Vol 2 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Chetan K. Modi ◽  
Ashwin S. Patel ◽  
Bharat T. Thaker
Keyword(s):  
Magnetic Moments ◽  
Picolinic Acid ◽  
Thermal Studies ◽  
Acid Hydrazide ◽  
Spectral Studies ◽  
Ligand Field ◽  
Conductivity Measurements ◽  
Octahedral Structure ◽  
Hydrazone Ligands ◽  
Ligand Field Parameters

The reaction of Co(NO3)2.6H2O and Ni(NO3)2.6H2O with hydrazones derived from 1-phenyl-3-methyl-4-acyl-5-pyrazolone (where acyl = acetyl, propionyl, butyryl and benzoyl) with 2-picolinic acid hydrazide have been studied and characterized on the basis of elemental analysis, magnetic moments, molar conductivity measurements, IR and electronic spectral studies and thermogravimetric analysis. Various ligand field parameters have been calculated. Electronic spectral data and the magnetic moment values suggest an octahedral structure for all cobalt(II) and nickel(II) complexes.

scholarly journals Synthesis, Structural Investigation and Antimicrobial Properties of Macrocyclic Zinc(II) Complexes with N2O2-Donor Schiff Bases Incorporating 1,2,4-Triazole Ring

2020 ◽  
Vol 32 (12) ◽  
pp. 3151-3156
Keyword(s):  
Schiff Bases ◽  
Structural Investigation ◽  
Thermal Studies ◽  
Antimicrobial Properties ◽  
Triazole Ring ◽  
Pathogenic Fungi ◽  
Elemental Analyses ◽  
Coordinated Water ◽  
In Situ Reactions

A novel series of nano-sized zinc(II) complexes of type [{Zn(M)(H2O)2}(CH3COO–)2] (where M = macrocyclic ligands) has been synthesized by the in situ reactions of Schiff bases derived from 3-(phenyl/substituted phenyl)-4-amino-5-hydrazino-1,2,4-triazoles, salicyldehyde/2-hydroxy-1- naphthaldehyde and 1,4-dibromobutane/1,5-dibromopentane in presence of zinc(II) acetate dihydrate in absolute ethanol. The structures of all these zinc(II) complexes were established on the basis of elemental analyses and spectral data (IR, 1H NMR and 13C NMR). Scanning electron microscopy studies have been carried out to investigate the particle size and surface morphology of a particular complex while thermal studies confirm the presence of coordinated water molecules in all the zinc(II) complexes. The antimicrobial effects of all the synthesized complexes were studied against different species of pathogenic fungi and bacteria.

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 and characterization of new types of 2-(6-methoxy-2-naphthyl)propionamide derivatives as potential antibacterial and antifungal agents

2013 ◽  
Vol 22 (11) ◽  
pp. 5598-5609 ◽  
Author(s):  
Mohamed H. Helal ◽  
Samir Y. Abbas ◽  
Mohamed A. Salem ◽  
Awatef A. Farag ◽  
Yousry A. Ammar
Keyword(s):  
Antifungal Agents ◽  
Synthesis And Characterization ◽  
Antibacterial And Antifungal

scholarly journals Synthesis and Characterization of Some Group 12 Metal Complexes with Tellurium Containing 10-Membered Tetraazamacrocyclic Ligands

2011 ◽  
Vol 8 (3) ◽  
pp. 1158-1163
Author(s):  
Nitu ◽  
K. K. Verma
Keyword(s):  
Metal Complexes ◽  
Spectral Studies ◽  
Conductivity Measurements ◽  
Metal Chlorides ◽  
Group 12 ◽  
Elemental Analyses ◽  
Physicochemical Studies ◽  
Tetraazamacrocyclic Ligands ◽  
Pmr Spectra

A new series of 10-membered tellurium containing tetraazamacrocyclic complexes, [ML1Cl2], [ML2Cl2] and [ML3Cl2], where [M=Zn(II), Cd(II), Hg(II); L1, L2and L3=10-membered tellurium containing tetraazamacrocyclic ligands] have been prepared via the template condensation of ethylenediamine and diaryltellurium dichlorides, R2TeCl2, (R=p-hydroxyphenyl, 3-methyl-4-hydroxyphenyl,p-methoxyphenyl) in the presence of metal chlorides. These complexes have been characterized by elemental analyses, conductivity measurements, infrared, electronic absorption and proton magnetic resonance spectral studies. IR and PMR spectra confirm the formation of 10-membered tetraazamacrocycle skeleton and their tetradentate nature. An octahedral geometry has been assigned to all the metal complexes on the basis of various physicochemical studies.

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