scholarly journals Mixed Ligand Complexes of quinoline-2-carboxylic acid and 4,4/-dimethyl-2,2/-bipyridyl with V(IV),Cr(III), Rh(III), Cd(II) and Pt(IV)

2014 ◽  
Vol 11 (3) ◽  
pp. 1180-1191
Author(s):  
Baghdad Science Journal
Keyword(s):  
Carboxylic Acid ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Theoretical Treatment ◽  
Tetrahedral Geometry ◽  
Pyramidal Geometry ◽  
Flame Atomic Absorption ◽  
Vis Spectroscopy ◽  
Atomic Absorption Technique ◽  
Ft Ir

A new mixed ligand complexes were prepared by reaction of quinoline -2-carboxylic acid (L1) and 4,4?dimethyl-2,2?-bipyridyl (L2) with V(IV),Cr(III), Rh(III), Cd(II) and Pt(IV) ions. These complexes were isolated and characterized by (FT-IR) and (UV-Vis) spectroscopy, elemental analysis, flame atomic absorption technique, thermogravimetric analysis, in addition to magnetic susceptibility and conductivity measurements. Most complexes were mononuclear and with octahedral geometry, except Cd (II) with tetrahedral geometry, and V (IV) with square pyramidal geometry. A theoretical treatment of the ligands and the prepared complexes in gas phase was done using two programs Hyperchem.8 and Gaussian program (GaussView Currently Available Versions (5.0.9) along with Gaussian 09 which is the latest in the Gaussian series of programs).

scholarly journals Synthesis and characterization of mixed ligand complexes of 8- hydroxy quinoline and Schiff base with some metal ions

2007 ◽  
Vol 4 (1) ◽  
pp. 102-109
Author(s):  
Baghdad Science Journal
Keyword(s):  
Conductivity Measurement ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Flame Atomic Absorption ◽  
Vis Spectroscopy ◽  
Atomic Absorption Technique ◽  
Ft Ir ◽  
Hydroxy Quinoline ◽  
Absorption Technique

A new mixed ligand complexes have been prepared between 8- hydroxy quinoline and o-hydroxybenzylidene-1-phenyl-2,3-dimethyl-4-amino-3-pyrazolin-5-on with Mn(II),Fe(II),Co(II),Ni(II) and Cu(II) ions . the prepared complexes were isolated and characterized by (FT-IR)and (UV-Vis) spectroscopy. Elemental analysis (C.H.N) Flame atomic absorption technique . in addition to magnetic susceptibility and conductivity measurement.

scholarly journals Synthesis and characterization of VO(II), Cr(III),Mn(II), Fe(II),Zn(II),Cd(II),Hg(II) and UO2(VI) complexes with ligands containing (ONO) and (ON) donor set atoms

2008 ◽  
Vol 5 (2) ◽  
pp. 285-296
Author(s):  
Baghdad Science Journal
Keyword(s):  
Conductivity Measurement ◽  
Molar Ratio ◽  
Ratio Measurement ◽  
Mixed Ligands ◽  
Flame Atomic Absorption ◽  
State Study ◽  
Vis Spectroscopy ◽  
Atomic Absorption Technique ◽  
Ft Ir ◽  
Hydroxy Quinoline

A new Schiff base o-hydroxybenzylidene-1-phenyl-2,3-dimethyl-4-amino-3-pyrazolin-5-on (HL) ,have been prepared and characterization.(HL) has been used as a chelating ligand to prepare a number of metal complexes VO(II) ,Cr(III) ,Mn(II),Fe(II),Hg(II) and UO2(II) .and mixed ligands complexes have been prepared between o-hydroxybenzylidene-1-phenyl-2,3-dimethyl-4-amino-3-pyrazolin-5-on and 8- hydroxy quinoline with VO(II),Zn(II),Cd(II), Hg(II) and UO2(II) the prepared complexes were isolated and characterized by (FT-IR)and (UV-Vis) spectroscopy. Elemental analysis (C.H.N) Chloride contents, Flame atomic absorption technique. in addition to magnetic susceptibility and conductivity measurement. Molar ratio measurement in solution gave comparable results with those obtained from solid state study.

scholarly journals Complexes of Some Transition Metal with 2-Benzoyl thiobenzimidazole and 1,10-Phenanthroline and Studying their Antibacterial Activity

2016 ◽  
Vol 13 (2) ◽  
pp. 84-94
Author(s):  
Baghdad Science Journal
Keyword(s):  
Antibacterial Activity ◽  
Gas Phase ◽  
Theoretical Treatment ◽  
Imine Group ◽  
Mixed Ligands ◽  
Flame Atomic Absorption ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Micro Analysis ◽  
Gaussian Program

Mixed ligands of 2-benzoyl Thiobenzimiazole (L1) with 1,10-phenanthroline (L2) complexes of Cr(III) , Ni(II) and Cu(II) ions were prepared. The ligand and the complexes were isolated and characterized in solid state by using FT-IR, UV-Vis spectroscopy, 1H, 13C-NMR, flame atomic absorption, elemental micro analysis C.H.N.S, magnetic susceptibility , melting points and conductivity measurements. 2-Benzoyl thiobenzimiazole behaves as bidenetate through oxygen atom of carbonyl group and nitrogen atom of imine group. From the analyses Octahedral geometry was suggested for all prepared complexes. A theoretical treatment of ligands and their metal complexes in gas phase were studied using HyperChem-8 program, moreover, ligands in gas phase also has been studied using Gaussian program (GaussView Currently Available Version (5.0.9) along with Gaussian 09 which was the latest in the Gaussian series of programs). The antibacterial activity of the prepared complexes have been determined and compared with that of the ligand and the standard metronidazole.

Spectroscopic investigations and physico-chemical characterization of newly synthesized mixed-ligand complexes of 2-methylbenzimidazole with metal ions

2011 ◽  
Vol 65 (3) ◽  
Author(s):  
Shayma Shaker ◽  
Hamid Khaledi ◽  
Hapipah Ali
Keyword(s):  
Chemical Characterization ◽  
Molar Conductance ◽  
Molar Conductivity ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Dimethyl Formamide ◽  
Planar Geometry ◽  
Tetrahedral Geometry ◽  
Thiocyanate Ion ◽  
Pyramidal Geometry

AbstractSome mixed ligand complexes containing 2-methylbenzimidazole and thiocyanate ion were synthesized. Free ligands and their metal complexes were characterized using elemental analysis, determination of metal, magnetic susceptibility, molar conductivity, infrared, UV-VIS, and (1H, 13C) NMR spectra, and X-ray structure analysis. The results suggest that the Ag(I) complex has linear geometry, Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and Cd(II) have tetrahedral geometry, Pd(II) complex has square planar geometry, VO(IV) square pyramidal geometry, Pb(II) irregular tetrahedral geometry, and that the Cr(III) and Mn(II) complexes have octahedral geometry. The following general formulae were proposed for the prepared complexes: [AgBX], [CrB3X3], (HB)2[MnB2X4] · 2B and [MB2X2], where B = 2-methylbenzimidazole, HB = 2-methylbenzimidazolium, X = thiocyanate ion, and M = VO(IV), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Pd(II), Cd(II), and Pb(II). Molar conductance of a 10−3 M solution in N,N-dimethyl formamide (DMF) indicates that all the complexes are non-electrolytes except the Mn(II) complex which is an electrolyte because the molar conductivity of its solution in DMF is high.

scholarly journals Synthesis, Spectral Studies, and Theoretical Treatment of New Ni(II),and Co(II) Complexes of Bidenetate Ligands 2-Benzamido Benzothiazole ,and 2-Actamido Benzothiazole

2013 ◽  
Vol 10 (3) ◽  
pp. 638-649
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
Electronic Spectroscopy ◽  
Conductivity Measurement ◽  
Spectral Studies ◽  
Theoretical Treatment ◽  
Flame Atomic Absorption ◽  
Monomer Structure ◽  
Atomic Absorption Technique ◽  
Homo And Lumo ◽  
Ft Ir

New metal complexes of the ligands 2-benzamido benzothiazole(B1), and 2-actamido benzothiazole(B2) with metal ions Ni(II),and Co(II) were prepared in alcoholic medium. The prepared complexes were characterized by FT-IR and electronic spectroscopy, Magnetic susceptibility, Flame Atomic Absorption technique as well as elemental analysis and conductivity measurement. From the spectral studies, an octahedral monomer structure proposed for Ni(II) complexes, and a tetrahedral monomer structure for Co(II)complexes.Semi-empirical methods (PM3,and ZINDO/1)were carried out to evaluate the heat formation( ?H?f)binding energy(?Eb) and dipole moment(µ)for all metal complexes. Also vibration frequencies, Electrostatic potential, HOMO and LUMO energies for ligands were calculated.

scholarly journals Synthesis and spectral characterizations of vanadyl(ii) and chromium(iii) mixed ligand complexes containing metformin drug and glycine amino acid

2021 ◽  
Vol 19 (1) ◽  
pp. 735-744
Author(s):  
Samar O. Aljazzar
Keyword(s):  
Amino Acid ◽  
Type Ii Diabetes ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Spectroscopic Techniques ◽  
Nanoscale Structures ◽  
Pyramidal Geometry ◽  
Effective Drugs ◽  
Square Pyramidal Geometry ◽  
Spectral Characterizations

Abstract Metformin is one of the most effective drugs for the treatment of type II diabetes. Two new mixed ligand complexes of vanadyl(ii) and chromium(iii) ions with the general formula [VOL1L2]SO4 and [CrL1L2(Cl)2]Cl, respectively, where L1 is the metformin and L2 is the glycine amino acid, have been synthesized in MeOH solvent with 1:1:1 stoichiometry and characterized by several spectroscopic techniques. The spectroscopic data suggested that the [VOL1L2]SO4 complex possesses a square pyramidal geometry, where the [CrL1L2(Cl)2]Cl complex possesses an octahedral geometry. The L1 ligand coordinated to the VO(ii) and Cr(iii) ions via the N atoms of the imino (‒C═NH) groups, where the L2 ligand coordinated via the O atom of the carboxylate group (COO) and the N atom of the amino group (NH2). The interaction of ligands L1 and L2 with the metal ions leads to complexes that have organized nanoscale structures with a main diameter of ∼14 nm for the [CrL1L2(Cl)2]Cl complex and ∼40 nm for the [VOL1L2]SO4 complex.

scholarly journals Some Novel Manganese(III) Mixed Ligand Complexes and its Decolourization Studies

2018 ◽  
Vol 34 (6) ◽  
pp. 2867-2871
Author(s):  
Deepika Jaiswal ◽  
Sudha Yadava
Keyword(s):  
Mass Spectrometry ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Distorted Octahedral Geometry ◽  
Ligand Field ◽  
Distorted Octahedral ◽  
Ft Ir ◽  
Ethylenediamine Ligand ◽  
Red Dye ◽  
Ligand Field Parameters

Some novel mixed ligand complexes of Mn(III) with glycine ligand namely [Mn(gly)2 Cl(en)], [Mn(gly)2 Br(en)], [Mn(gly)2 N3 (en)] and [Mn(gly)2 NCS(en)] have been synthesized starting from Mn(gly)2 Cl, Mn(gly)2 Br, Mn(gly)2N3 and Mn(gly)2 NCS respectively. These newly synthesized complexes have been characterized by UV/Vis, FT-IR and Mass spectrometry. The spectroscopic data suggest distorted octahedral geometry for all these mixed ligand complexes. The λmax values of these complexes for 5T2g → 5Eg transitions are 482 nm for [Mn(gly)2N3(en)], 488 for [Mn(gly)2NCS(en)], 486 for [Mn(gly)2 Br(en)] and 484 for [Mn(gly)2Cl(en)], all these transitions are red shifted in comparison to their parent complexes. The ligand field parameters such as 10 Dq, B and β have also been calculated and suggest covalent metal ligand bonding. One peculiar finding is that the FT-IR spectra shows frequencies for both free and coordinated NH2 group in all complexes indicating that the ethylenediamine ligand present here is non bridging in nature. The mass spectrometry results show molecular ion peaks at m/z 300, 345, 307 and 323 for [Mn(gly)2Cl(en)], [Mn(gly)2Br(en)], [Mn(gly)2N3(en)] and [Mn(gly)2NCS(en)] respectively. The coordination of ethylenediamine to Mn(III) enhances its efficiency towards decolourization methyl red dye.

scholarly journals Synthesis Characterization and Biological Activities of Coordination Compounds of 4-Hydroxy-3-nitro-2H-chromen-2-one and Its Aminoethanoic Acid and Pyrrolidine-2-carboxylic Acid Mixed Ligand Complexes

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Temitayo Aiyelabola ◽  
Ezekiel Akinkunmi ◽  
Efere Obuotor ◽  
Idowu Olawuni ◽  
David Isabirye ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Coordination Compounds ◽  
Biological Activities ◽  
Amino Nitrogen ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Molar Ratio ◽  
Cytotoxic Activities ◽  
Carboxylate Oxygen ◽  
Edx Analyses

Coordination compounds of 4-hydroxy-3-nitro-2H-chromen-2-one and their mixed ligand complexes with aminoethanoic acid and pyrrolidine-2-carboxylic acid were synthesized by the reaction of Cu(II) and Zn(II) salts in molar ratio 1 : 2 for the coumarin complexes and 1 : 1 : 1 for the mixed ligand complexes, in basic media. The compounds formed were characterized using infrared, Uv-vis spectrophotometric analyses, mass spectrometry, magnetic susceptibility measurements, and EDX analyses. It was concluded that 4-hydroxy-3-nitro-2H-chromen-2-one coordinated as a monobasic ligand for all the complexes; it also coordinated via the carbonyl moiety in the case of the Cu(II) mixed ligand complexes. Similarly it was proposed that the amino acids also coordinated in a bidentate fashion via their amino nitrogen and carboxylate oxygen atoms. The synthesized compounds were screened for their antimicrobial and cytotoxic activities. The complexes exhibited marginal antimicrobial activity but good cytotoxic activity.

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