scholarly journals Electronic Structure and Spectral Study of Some Five Coordinate Complexes of Copper (II)

2019 ◽  
Vol 35 (4) ◽  
pp. 1463-1468
Author(s):  
Birendra Kumar ◽  
Rekha Rani ◽  
Dayanand Prasad ◽  
Praveen Kumar Singh ◽  
Amit Kumar ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Electronic Spectra ◽  
Spectral Study ◽  
Metal Ion ◽  
Molar Conductivity ◽  
Trigonal Bipyramidal ◽  
Secondary Ligand

1-phenylazo-2-nephthol has been synthesized and used for complexation with Cu(II) metal ion along with pyridine, α-picoline, β- picoline, γ-picoline and water as secondary ligands. On the basis of elemental analysis and molar conductivity complexes were formulated as CuL2X [Where L is the prime ligand i.e 1-phenyl-azo-2-nephthol and X is the secondary ligand i.e. pyridine, α-picoline, β-picoline, and H2O.] The magnetic moment of these complexes (1.80 - 1.83 BM) indicates that these complexes are magnetically dilute. The appearance of 3 bands in the electronic spectra of complexes rules out the trigonal bipyramidal (D3h) symmetry arround Cu(II) ion in these complexes rather the electronic spectra favours square pyramidal (C4V) symmetry of these five coordinate complexes. The highest value of 10Dq clearly indicates the greater coordinating ability of α-picoline than pyridine, β-picoline and γ-picoline.

scholarly journals Investigation on Spectroscopic, Thermal and Antimicrobial Activity of Newly Synthesized Binuclear Cr(III) Metal Ion Complex

2016 ◽  
Vol 8 (2) ◽  
pp. 181-189 ◽  
Author(s):  
M. R. Islam ◽  
J. A. Shampa ◽  
M. Kudrat-E-Zahan ◽  
M. M. Haque ◽  
Y Reza
Keyword(s):  
Magnetic Moment ◽  
Metal Ion ◽  
Water Molecules ◽  
Octahedral Structure ◽  
Diphenylacetic Acid ◽  
Vis Spectroscopy ◽  
Magnetic Moment Measurement ◽  
Tga Analysis ◽  
Secondary Ligand ◽  
Metal Ion Complex

Binuclear Cr(III) metal ion complex was synthesized using diphenylacetic acid as primary ligand and 2-methyl pyridine (2-picoline) as secondary ligand. The synthesized complex was characterized by conductivity, FTIR, UV-Vis spectroscopy, magnetic moment and thermogravimetric analysis (TGA). FTIR spectra indicated the coordination of deprotonated diphenylacetic acid and 2-picoline through nitrogen and oxygen. The presence of water molecules inside the coordination sphere of the complex was confirmed from IR spectrum and TGA analysis. Binuclear and octahedral structure of the Cr(III) complex confirmed by TGA, UV-Vis spectroscopy and magnetic moment measurement. The complex showed moderate antibacterial activity with no antifungal activity.

scholarly journals Synthesis, Spectral Characterization and Pharmacological Significance of Cr(III) and Mn(II) Complexes with Schiff Base and Thiocyanate Ion as Ligands

2019 ◽  
Vol 11 (05) ◽  
Author(s):  
R. Govindharaju ◽  
P. Durairaj ◽  
T. Maruthavanan ◽  
M. Marlin Risana ◽  
T. Ramachandramoorthy
Keyword(s):  
Schiff Base ◽  
Free Radical ◽  
Ir Spectra ◽  
Metal Complexes ◽  
Magnetic Moment ◽  
Electronic Spectra ◽  
Metal Ion ◽  
Diffusion Method ◽  
Thiocyanate Ion ◽  
Ft Ir

Cr(III) and Mn(II) metal complexes of Schiff base ligand derived from phenylacetylurea condensed with salicylaldehyde (SBPS) and thiocyanate(SCN-) ion were synthesized by using microwave irradiation. Microwave assisted synthesis gives high yield of the complexes within a very short time. The molecular formulae and the geometry of the complexes have been deduced from elemental analysis, metal estimation, electrical conductance, magnetic moment, electronic spectra, FT- IR, Far IR spectra, cyclic voltammetry, thermal analysis and powder-XRD techniques. The molar conductance values indicate that the complexes are non-electrolyte (1:0) type. FT-IR spectra show that Schiff base and thiocyanate ion are coordinated to the metal ion in a monodentate manner. The electronic spectra and the magnetic moment indicate the geometry of the complexes is found to be octahedral. The antimicrobial activities of ligands and their Cr(III) and Mn(II) complexes were studied against the microorganisms, viz., E. coli, Klebsiella Pneumonia, P. aeruginosa, S. aureus, Bacillus cereus, Aspergillus flavus, Aspergillus niger, Aspergillus oryzae, Aspergillus sojae and Candida albicans by agar well diffusion method. The complexes show moderate activity against the bacteria and enhanced activity against the fungi as compared to free SBPS ligand. The free radical scavenging activity of the complexes and the ligands has been determined by measuring their interaction with the stable free radical, DPPH. The complexes have larger antioxidant activity as compared to the ligand. DNA-binding properties have been studied by fluorescence-emissions method. The results suggest that the complexes strongly bind to DNA because of metal complexes are well-known to speed up the drug action and the ability of a therapeutic agent which can frequently be enhanced upon coordination with a metal ion.

scholarly journals Metal Complexation Studies of 1-(4-Carboxy-3-hydroxy-N-methyl phenyl- amino methyl) 2-methyl perimidine

2009 ◽  
Vol 6 (s1) ◽  
pp. S452-S458
Author(s):  
Umang N. Patel ◽  
Arun Singh
Keyword(s):  
Antimicrobial Activity ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Conductivity Measurement ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Aminosalicylic Acid ◽  
Complexation Studies ◽  
Methyl Phenyl

Aminomethylation of 2-methyl perimidine was carried out by treating 2-methyl perimidine with formaldehyde and 4-aminosalicylic acid. The resultant compound was designed as 1-(4-caroxy-3-hydroxy-N-methyl phenylamino methyl)2-methyl perimidine. The transition metal complexes of Cu2+, Co2+, Ni2+, Mn2+and Zn2+have been prepared and characterized by elemental analysis, spectral studies, magnetic moment determination, molar conductivity measurement and antimicrobial activity.

scholarly journals Metal Complexation Studies of 1-(4-Carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole

2009 ◽  
Vol 6 (2) ◽  
pp. 475-480 ◽  
Author(s):  
P. K. Patel ◽  
P. D. Dpatel
Keyword(s):  
Transition Metal ◽  
Metal Complex ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Transition Metal Complex ◽  
Conductivity Measurement ◽  
Molar Conductivity ◽  
Spectral Studies ◽  
Aminosalicylic Acid ◽  
Complexation Studies

Aminomethylation of benzotriazole was carried out by treating benzotrialzole with formaldehyde and 4-aminosalicylic acid. The resultant compound was designed as 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole. The transition metal complex of Cu2+, Co2+, Ni2+, Mn2+, and Zn2+, of 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole have been prepared. Elemental analysis, spectral studies, magnetic moment determination, molar conductivity measurement and microbial activity of 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole and its metal complexes were carried out.

scholarly journals Bimetallic Cd(II) and Hg(II) complexes of 1, 4-bis-(5-H/methyl/chloro-1H-benzimidazol- 2-yl)-1, 2, 3, 4-butanetetraols

2005 ◽  
Vol 70 (8-9) ◽  
pp. 1067-1073 ◽  
Author(s):  
Aydin Tavman
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Metal Ion ◽  
1H Nmr Spectroscopy ◽  
Imidazole Ring ◽  
Molar Conductivity ◽  
Hydroxyl Groups ◽  
Hydroxyl Oxygen ◽  
Oxygen Atoms

The bimetallic complexes of 1,4-bis-(5-H/methyl/chloro-1H-benzimidazol 2-yl)-1,2,3,4-butanetetraols (L1?L3) with CdCl2 and HgCl2 were synthesized and characterized by elemental analysis, molar conductivity, as well as IR and 1H-NMR spectroscopy. The ligands coordinate to the metal ion through all of the hydroxyl oxygen atoms as tetradentate in the Hg(II) complexes of L1?L3 and in the Cd(II) complexes of L2 and L3. In theCd2(L1)Cl4 complex, the ligand acts as tetradentate through the benzimidazole nitrogen atoms and the two oxygen atoms of the hydroxyl groups near the imidazole ring.

Preparation, Infrared Spectra, Electronic Spectra, and Magnetic Moments of Copper(II) Complexes of N-Acetylglycine and Their Amine Adducts

1974 ◽  
Vol 52 (21) ◽  
pp. 3607-3611 ◽  
Author(s):  
G. Marcotrigiano ◽  
G. C. Pellacani
Keyword(s):  
Infrared Spectrum ◽  
Infrared Spectra ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Electronic Spectra ◽  
Magnetic Moments ◽  
The Other ◽  
Square Planar ◽  
Amine Adducts ◽  
Planar Pattern

Compounds of the type [CuA2•H2O]2 and [CuA2•4H2O]2 have been prepared, where A is N-acetylglycine (aceturic acid). Amine adducts of the type CuA2B (B = piperazine, 2,2′-bipyridine, and 1,10-phenantroline) and CuA2B2 (B = N-methylpiperazine, piperidine, morpholine, pyridine, and ethylenediamine) were obtained by reaction of the amines with CuA2•4H2O. Each complex was characterized by elemental analysis, infrared spectrum, electronic spectrum, and magnetic moment. For the piperazine and ethylenediamine adducts a square-planar pattern of coordination about copper(II) ion is probable, while for the other amine adducts a square-pyramidal structure is proposed. For all the complexes the coordination of the N-acetylglycine occurs only through the terminal carboxyl oxygen in a monodentate arrangement.

Antimicrobial Activity of 2-((2-(hydroxyimino)-1- phenylpropylidene) Hydrazono)-1, 2- diphenylethanone (HMPPH) and its Derivative

2020 ◽  
Vol 5 (7) ◽  
pp. 1056-1060
Author(s):  
M.J. Lele ◽  
Dr.R.G. Deshmukh
Keyword(s):  
Antimicrobial Activity ◽  
Biological Activity ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Electronic Spectra ◽  
Spectroscopic Investigation ◽  
Molecular Formula ◽  
Preliminary Screening ◽  
First Time

A new series of Cu(II), Pt(II) and Pd(II) complexes were prepared with ligand 2-((2- (hydroxyimino)-1-phenylpropylidene) Hydrazono)-1, 2- diphenylethanone (HMPPH) corresponding to molecular formula (C23H18N3O2) has been synthesized and reported for the first time. The Schiff base and its metal complexes were characterized on the basis of various spectroscopic investigation like IR, NMR, UVVISIBLE spectroscopy, elemental analysis etc. While the geometry of the complexes was confirmed by electronic spectra, magnetic moment measurements. A preliminary screening of these compounds for biological activity against various microorganisms has indicated that they are microbial active against some microorganisms.

scholarly journals Dinuclear UO2(VI), Th(IV), ZrO(IV) and VO(IV) complexes based on some Schiff-base ligands: Synthesis and structural elucidation

2013 ◽  
Vol 2 (1) ◽  
pp. 50-56
Author(s):  
Ranjan K. Mohapatra ◽  
S. Ghosh ◽  
P. Naik ◽  
D. C. Dash
Keyword(s):  
Thermal Analysis ◽  
Schiff Base ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Molar Conductivity ◽  
Template Method ◽  
Nmr Studies ◽  
Schiff Base Ligands ◽  
Paramagnetic Complexes

A series of homo binuclear complexs of the type [M2(L/L’)(NO3)n(H2O)2], [where M=UO22+, Th4+, ZrO2+] and [(VO)2(L/L’)(SO4)(H2O)], L= 4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene or L’= 10:11-benzo-4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene, n=2 for UO22+, ZrO2+  n=6 for Th4+, have been synthesized in template method from ethylenediamine/orthophenylene diamine, benzil monohydrazone and salicyldehyde and characterized on the basis of elemental analysis, thermal analysis, molar conductivity, magnetic moment, electronic, infrared, 1H-NMR studies.  The results indicate that the VO(IV) ion is penta co-ordinated yielding paramagnetic complexes; UO2(VI), ZrO(IV) ions are hexa co-ordinated where as Th(IV) ion is octa co-ordinated yielding diamagnetic complexes of above composition.

scholarly journals Complexes cobalt(II), zinc(II) and copper(II) with some newly synthesized benzimidazole derivatives and their antibacterial activity

1999 ◽  
Vol 64 (5-6) ◽  
pp. 381-388 ◽  
Author(s):  
S.O. Podunavac-Kuzmanovic ◽  
V.M. Leovac ◽  
N.U. Perisic-Janjic ◽  
J. Rogan ◽  
J. Balaz
Keyword(s):  
Antibacterial Activity ◽  
Magnetic Susceptibility ◽  
General Formula ◽  
Elemental Analysis ◽  
Electronic Spectra ◽  
Erwinia Amylovora ◽  
Erwinia Carotovora ◽  
Molar Conductivity ◽  
Benzimidazole Derivatives ◽  
Tetrahedral Structure

The preparation and properties of some complexes of cobalt(II), zinc(II) and copper(II) with several newly synthesized benzimidazole derivatives (L) are reported. The complexes, of the general formula [MCl2L2] (M=Co(II), Zn(II)) and [CuCl2L(H2O]), have a tetrahedral structure. The complexes were characterized by elemental analysis, molar conductivity, magnetic susceptibility measurements, IR and absorption electronic spectra. The antibacterial activitiy of the benzimidazoles and their complexes was evaluated against Erwinia carotovora subsp. carotovora and Erwinia amylovora. The complexes were found to be more toxic than the ligands.

scholarly journals Synthesis, spectroscopic and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes derived from benzoic acid bidentate Schiff base ligand

2021 ◽  
Vol 25 (9) ◽  
pp. 1599-1603
Author(s):  
I. ADO ◽  
J. NA’ALIYA ◽  
S. SANI ◽  
M.M. HALEELU
Keyword(s):  
Magnetic Susceptibility ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Magnetic Moment ◽  
Metal Ion ◽  
Molar Conductance ◽  
Molar Ratio ◽  
Planar Geometry ◽  
Azomethine Group

The Schiff base was synthesized by condensation of 2-hydroxy-1-naphthaldehyde with 3- aminobenzoic acid in 1:1 molar ratio. The Schiff base ligand formed complexes with Co (II), Ni (II), Cu (II) and Zn (II) acetate via mechanochemical synthesis. The synthesized compounds were characterized by solubility test, thermal analysis, FT-IR, powder x-ray diffraction, molar conductance measurement, magnetic susceptibility and elemental analysis. The Schiff base has a melting point of 190 oC. The decomposition temperature of complexes was found to be in the range 289 – 302 oC. The Schiff base and its metal (II) complexes were soluble in DMF, DMSO and sparingly soluble in acetonitrile, chloroform, diethyl ether and insoluble in n-hexane which indicate the polar nature of the synthesized compounds. The IR spectral analysis of the free Schiff base shows a band at 1622 cm-1, assigned to v(C=N) stretching vibrations. This band was shifted in the spectra of complexes (1607 – 1633 cm-1), indicating coordination of the Schiff base to the metal ion through the azomethine group. The molar conductance of complexes determined are in the range 9.51 – 14.87 Ohm-1cm2mol-1 which indicate the non-electrolytic nature in DMF. Magnetic susceptibility measurements of Co (II), Ni (II) and Cu (II) complexes exhibit a magnetic moment in the range 1.25 – 3.08 BM. The values correspond to square-planar geometry. The magnetic moment value of Zn (II) complex indicates a diamagnetic behaviour. The elemental analysis of the complexes for C, H and N determined showed that the observed and the calculated percentages of the elements are in good agreement.

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