Infrared Spectral Studies of Metal Chelates of 2-Furan Carboxaldoxime

1977 ◽  
Vol 32 (2) ◽  
pp. 225-228 ◽  
Author(s):  
V. K. Gupta ◽  
A. N. Bhat
Keyword(s):  
Metal Complexes ◽  
Furan Ring ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
Trivalent Metal ◽  
Bivalent Metal ◽  
Infra Red ◽  
Infrared Spectral ◽  
Anti Form ◽  
Cu And Zn

2-Furan carboxaldoxime (anti-form) or anti-furan 2-aldoxime (FDH) forms octahedral complexes of the type M(FDH)2Cl2 (M = Mn, Co, Ni, Cu and Zn) and M(FDH)3Cl3 (M = Cr and Fe). The infra red spectral studies have revealed that the coordination of the metal involved the oxime oxygen and the furan ring oxygen. However, the ligand acts as bidentate in case of M(FDH)2Cl2 while it is monodentate in M(FDH)3Cl3. The M-O bands in the infrared spectra may be taken as a criterion for the denticity of the ligand in its various metal complexes. Bands at 670-630 cm-1 and around 450 cm-1 indicate the bidentate ligand, while the absence of the band at 670-630 cm-1 reveals monodenticity. The : C=N-stretching frequency has been found to increase with decreasing stability of the bivalent metal complexes, while it is insensitive in case of the trivalent metal complexes.

PREPARATION AND CHARACTERIZATION OF SOME BINARY AND TERNARY METAL COMPLEXES OF IMIDAZOLE AND AMINO ACIDS

1966 ◽  
Vol 44 (14) ◽  
pp. 1637-1641 ◽  
Author(s):  
G. N. Rao ◽  
N. C. Li
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Metal Complexes ◽  
Proton Magnetic Resonance ◽  
Spectral Studies ◽  
Visible Spectra ◽  
Infrared Spectral ◽  
Ternary Metal ◽  
Ternary Metal Complexes

Five new ternary metal complexes containing imidazole and glycylglycine or amino acid have been prepared and characterized by proton magnetic resonance and infrared spectral studies. Seven new binary metal complexes have also been prepared and studied. The isolation of Cd(imidazole)6Cl2•H2O and Ni(imidazole)6-Cl2•4H2O provides evidence that the coordination number of these metal ions to imidazole in the solid state is six. The visible spectra of the Ni(II) complexes of amino acid and imidazole show that all these are octahedral in aqueous solution.

scholarly journals Studies on Inclusion Complexes of β-Cyclodextrin with Some Metal Complexes of Isatinylsemicarbazone and Isatinylthiosemicarbazone

2020 ◽  
Vol 32 (12) ◽  
pp. 3197-3202
Author(s):  
Rajeev Kumar ◽  
Sanjay Kumar ◽  
Madhu Bala
Keyword(s):  
Magnetic Susceptibility ◽  
Metal Complexes ◽  
Inclusion Complexes ◽  
Analytical Data ◽  
Molar Conductance ◽  
Spectral Studies ◽  
Tetrahedral Geometry ◽  
Solid States ◽  
Spectral Bands ◽  
Infrared Spectral

The complexes of Co(II), Ni(II), Zn(II) and Cd(II) with isatinylsemicarbazone (IstscabH) and isatinylthiosemicarbazone (IsttscabH) of composition ML2·2H2O [M = Co(II) or Ni(II) and LH = IstscabH or IsttscabH] and ML2 [M = Zn(II) or Cd(II) and LH = IstscabH or IsttscabH] have been synthesized and their antibacterial activity has been investigated. Their inclusion complexes with β-cyclodextrin (β-CD) having composition [ML2(β-CD)·2H2O] or M(C60H88N8O39S2)], [M = Co(II) or Ni(II) and LH = IstscabH or IsttscabH] and [ML2(β-CD) or M(C60H84N6O-37S2)], [M = Zn(II) or Cd(II) and LH = IstscabH or IsttscabH] have also been isolated in solid states. All the synthesized metal complexes have been characterized by analytical data, molar conductance, magnetic susceptibility, electronic and infrared spectral studies. The tetrahedral geometry for Zn(II) and Cd(II) and octahederal geometry for Co(II) and Ni(II) have been assigned on the basis of magnetic susceptibility, UV electronic transitions and IR spectral bands assignments. The structures are retained in inclusion products. A biological activity of Schiff bases, their metal complexes and inclusion products for bacteria Escherichia. coli, Bacillus subtilis and Staphylococcus aureus have been screened and activity explained.

The Metal Complexes of Heterocyclic β-Diketones and their Derivatives, Part VIII Synthesis, Structure, Proton NMR and Infrared Spectral Studies of the Complexes of Al(III), Fe(III), Co(III), Rh(III), In(III), and Zr(IV) with l-Phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 (HPMTFP)

1981 ◽  
Vol 36 (2) ◽  
pp. 213-217 ◽  
Author(s):  
Emmanuel Chukwuemeka Okafor
Keyword(s):  
Infrared Spectroscopy ◽  
Ir Spectra ◽  
Metal Complexes ◽  
Magnetic Moment ◽  
Proton Nmr ◽  
Spectral Studies ◽  
Elemental Analyses ◽  
Infrared Spectral ◽  
Pmr Spectra ◽  
Neutral Metal

New complexes of Al(III), Fe(III), Co(III), Rh(III), In(III) and Zr(IV) with 1-phenyl- 3-methyl-4-trifluoroacetyl-pyrazolone-5, (HPMTFP), have been synthesized and characterized by means of elemental analyses, conductivity and magnetic moment measurements, proton NMR and infrared spectroscopy. It is concluded that the ligand, HPMTFP, reacts as a bidentate enol forming neutral metal chelates. The PMR spectra of chelates sufficiently soluble in deuterated NMR solvents were recorded and studied. The IR spectra are measured between 4000-200 cm-1 and assignments are proposed for the observed frequencies. The M-O stretching frequency follows the order: AI > Rh > Fe = Co = Zr > In.

scholarly journals Spectroscopic and Biological Studies on Newly Synthesized Cobalt (II) and Nickel (II) Complexes with 2-Acetyl Coumarone Semicarbazone and 2-Acetyl Coumarone Thiosemicarbazone

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Sanjay Goel ◽  
Sulekh Chandra ◽  
Sudhanshu Dhar Dwivedi
Keyword(s):  
Magnetic Susceptibility ◽  
Metal Complexes ◽  
Antioxidant Activities ◽  
Molar Conductance ◽  
Metal Salts ◽  
Spectral Studies ◽  
Planar Geometry ◽  
Square Planar ◽  
Biological Studies ◽  
Infrared Spectral

Co(II) and Ni(II) complexes of general composition ML2X2(M = Co(II), Ni(II); X = Cl−,NO3 −) were synthesized by the condensation of metal salts with semicarbazone/thiosemicarbazone derived from 2-acetyl coumarone. The ligands and metal complexes were characterized by NMR, elemental analysis, molar conductance, magnetic susceptibility measurements, IR, and atomic absorption spectral studies. On the basis of electronic, molar conductance and infrared spectral studies, the complexes were found to have square planar geometry. The Schiff bases and their metal complexes were tested for their antibacterial and antioxidant activities.

scholarly journals Synthesis, Characterization and Toxicity Evaluation of Cu(II), Mn(II), Co(II), Ni(II), Pd(II) Complexes with Ligand Derived from Hydrazinecarbothioamide

2018 ◽  
Vol 69 (11) ◽  
pp. 2959-2963 ◽  
Author(s):  
Elena Pahontu ◽  
Laura Ileana Socea ◽  
Stefania Felicia Barbuceanu ◽  
Diana Carolina Ilies ◽  
Mihaela Badea ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Magnetic Susceptibility ◽  
Metal Complexes ◽  
Daphnia Magna ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Toxicity Evaluation ◽  
Physico Chemical ◽  
Infrared Spectral ◽  
Chemical Techniques

New copper(II), manganese(II), cobalt(II), nickel(II) and palladium(II) complexes, [Cu(L)(X)(H2O)] [X= OAc- (1), Cl- (3), ClO4- (4)], [M(L)2(H2O)2] [M= Cu2+(2), Mn2+(5)], [M(L)(OAc)(H2O)] [M= Co2+(6), Pd2+(8)], [Ni(L)(OAc)] (7) were synthesized with 2-(5H-dibenzo [a,d][7] annulen-5-ylacetyl)-N-(4-chlorophenyl) hydrazinecarbothioamide (HL). All the metal complexes have been characterized by different physico-chemical techniques like molar conductivity, magnetic susceptibility measurements, electronic and infrared spectral studies, elemental and thermal analysis. The toxicity of newly synthesized compounds was evaluated using the Daphnia magna bioassay.

scholarly journals Synthesis, spectral characterization, cyclic voltammety, molecular modeling and catalytic activity of sulfa-drug divalent metal complexes

2014 ◽  
Vol 10 (2) ◽  
pp. 2234-2245
Author(s):  
Safaa N. Abdou ◽  
Abeer A. Faheim ◽  
Abdel-Nasser M. A. Alaghaz
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes ◽  
Molar Conductance ◽  
Divalent Metal ◽  
Bidentate Ligand ◽  
Spectral Studies ◽  
Ligand Field ◽  
Spectroscopic Techniques ◽  
Sulfa Drug ◽  
Divalent Metal Complexes

Complexes of cobalt(II), nickel(II), copper(II), zinc(II) and Hafnium(II) of general composition [M(L)2(Cl)2] have been synthesized [L = 4-(phenylphosphinylideneamino-N-thiazolylbenzenesulfonamide]. The elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, IR, UV, NMR, SEM, EDX, thermal and EPR spectral studies of the compounds led to the conclusion that the ligand acts as a bidentate manner. The molar conductance of the complexes in fresh solution of DMSO lies in the range of 7.46–9.13 Ω-1 cm2mol‒1 indicating their non-electrolytic behavior. On the basis of analytical and spectroscopic techniques, octahedral geometry of the complexes was proposed. The ligand acts as bidentate ligand, coordinated through sulfonamide oxygen and thiazole nitrogen atoms. The ligand field parameters were calculated for Co(II), Ni(II) and Cu(II) complexes and their values were found in the range reported for a octahedral structure. The catalytic activities of the divalent metal complexes have been studied in the oxidation of cyclohexane, using environmental friendly oxidant, hydrogen peroxide. Complex with rough surface has shown higher catalytic activity compared to the other complexes. The molecular parameters of the ligand and its Co(II) and Hf(II) complexes have been calculated. 

scholarly journals Synthesis, Characterization, and Biological Evaluation of Some 3d-Metal Complexes of Schiff Base Derived from Xipamide Drug

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Suman Malik ◽  
Suparna Ghosh ◽  
Bharti Jain ◽  
Archana Singh ◽  
Mamta Bhattacharya
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Elemental Analysis ◽  
Biological Evaluation ◽  
Molar Conductance ◽  
Bidentate Ligand ◽  
Azomethine Nitrogen ◽  
Spectral Studies ◽  
Elemental Analysis Data ◽  
Central Metal

The present paper deals with the synthesis and characterization of metal complexes of Schiff base derived from xipamide, a diuretic drug. The bidentate ligand is derived from the inserted condensation of 5-aminosulfonyl-4-chloro-N-2,6-dimethyl phenyl-2-hydroxybenzamide (Xipamide) with salicylaldehyde in a 1 : 1 molar ratio. Using this bidentate ligand, complexes of Hg(II), Zn(II), and VO(IV) with general formula ML2 have been synthesized. The synthesized complexes were characterized by several techniques using molar conductance, elemental analysis, magnetic susceptibility, FT-IR spectroscopy, electronic spectra, mass spectra, and particle size analysis. The elemental analysis data suggest the stoichiometry to be 1 : 2 [M : L]. All the complexes are nonelectrolytic in nature as suggested by molar conductance measurements. Infrared spectral data indicate the coordination between the ligand and the central metal ion through deprotonated phenolic oxygen and azomethine nitrogen atoms. Spectral studies suggest tetrahedral geometry for Hg(II), Zn(II) complexes, and square pyramidal geometry for VO(IV) complex. The pure drug, synthesized ligand, and metal complexes were screened for their antifungal activities against Aspergillus niger and Aspergillus flavus. The ligand and its Hg(II) and VO(IV) complexes were screened for their diuretic activity too.

scholarly journals Synthesis and Characterization of a New Bidentate Ligand 5-Substituted-(2-methyl-5-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione and its Metal Complexes of Ag(I), Cu(II) and Zn(II)

2011 ◽  
Vol 8 (s1) ◽  
pp. S127-S136
Author(s):  
Shabbir A. A. Kazi
Keyword(s):  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Thermal Studies ◽  
Bidentate Ligand ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Ligand Molecule ◽  
H Nmr ◽  
Elemental Analyses

A new ligand (2-methyl-5-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione (L) and its Ag(I),Cu(II) and Zn(II) complexes were synthesized. The authenticity of the ligand and its transition metal complexes were established by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR,1H NMR, electronic, mass and ESR) and thermal studies. The IR spectral studies revealed the existence thiol-thione tautamerism in the ligand molecule. The magnetic and electronic spectral studies suggest an octahedral geometry for Cu(II) and Zn(II) complexes. The ligand acts as a bidentate coordinating through the N-3 nitrogen and the exocyclic sulfur atoms of oxadiazole rings. Antimicrobial screening of the ligand and its metal complexes were determined against the bacteriaEscherichia coliandSalmonella paratyphiA.

Laser Raman and infrared spectral studies on imidazolium complexes of bivalent copper and zinc

1973 ◽  
Vol 26 (9) ◽  
pp. 2059 ◽  
Author(s):  
K Colyvas ◽  
RP Cooney ◽  
WR Walker
Keyword(s):  
Spectroscopic Data ◽  
Spectral Studies ◽  
Imidazolium Chloride ◽  
Imidazolium Cation ◽  
Laser Raman ◽  
Infrared Spectral ◽  
Raman And Infrared Spectroscopy ◽  
Bivalent Copper ◽  
First Time ◽  
Cu And Zn

The complexes [imH2]2 [CuCl4], [imH2], [CuBr4], and [imH2]2 [ZnCl4] containing the imidazolium cation [imH2]+ have been prepared for the first time and studied by laser Raman and infrared spectroscopy. The spectroscopic data are compared to those from studies with imidazole, imidazolium chloride, methylammonium tetrachlorocuprate(II), caesium tetrachlorocuprate(II), and caesium tetrachlorozincate(II). It is concluded that in [imH2]2 [MCl4] (M = Cu and Zn), a distorted tetrahedral (D2d) model is favoured for [CuCl4]2- and that [ZnCl4]2- possesses a slight distortion from Td symmetry.

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