Metal complexes of sulfur–nitrogen chelating agents. V. 2-N-Ethylaminocyclopentene-1-dithiocarboxylic acid complexes of Ni(II), Pd(II), Pt(II), Co(II), Co(III), and Cu(I)

1976 ◽  
Vol 54 (17) ◽  
pp. 2827-2831 ◽  
Author(s):  
K. Nag ◽  
D. S. Joardar
Keyword(s):  
Thermal Analysis ◽  
Metal Ions ◽  
Metal Complexes ◽  
Magnetic Moment ◽  
Nmr Spectra ◽  
Chelating Agents ◽  
Metal Chelates ◽  
Ambidentate Ligand

2-N-Ethylaminocyclopentene-1-dithiocarboxylic acid (EACDA) acts as an ambidentate ligand toward several metal ions. Bis-chelates have been obtained with Ni(II), Pd(II), Pt(II), and Co(II), and tris-chelate with Co(III). Cu(I) forms a 1:1 complex. The bonding sites involved in the metal chelates and their stereochemistry have been ascertained from electronic, infrared and nmr spectra, magnetic moment, and thermal analysis. In the Co(II) and Co(III) chelates bonding takes place from (S,S−) donor sites, whereas in the Ni(II), Pd(II), and Pt(II) chelates (N,S−) type bonding occurs. The Cu(I) complex appears to be polymeric in nature.

scholarly journals CHARACTERISATION OF Fe(III), Co(II), Ni(II) AND Cu(II) COMPLEXES OF SALICYLSALICYCLICACID HYDRAZONE BY PHYSICO-CHEMICAL METHODS

2011 ◽  
Vol 08 (16) ◽  
pp. 6-16
Author(s):  
Srilalitha VINNAKOTA ◽  
Raghavendra Guru Prasad ALURU ◽  
Ramana Kumar KAKARLA ◽  
Seshagiri VAHI ◽  
RAO KRISHNA RAO Ravindranath LAXMAN
Keyword(s):  
Thermal Analysis ◽  
Metal Ions ◽  
1H Nmr ◽  
Magnetic Moment ◽  
Nmr Spectra ◽  
Molar Conductivity ◽  
1H Nmr Spectra ◽  
Chemical Methods ◽  
Physico Chemical ◽  
Elemental Analyses

The complexes of Fe(III), Co(II), Ni(II) and Cu(II) with salicylsalicyclicacid hydrazone (SSAH) were synthesized. The ligand and the complexes were characterized by elemental analyses, UV-Vis, IR and 1H NMR spectra, as well as by thermal analysis, molar conductivity and magnetic moment measurements. The tentative geometry of the complexes was proposed in each case and it was proposed that the metal ions under study form 1:1 complex with the ligand.

Formation of bidentate metal chelates from some related pyridine compounds

1967 ◽  
Vol 20 (10) ◽  
pp. 2101 ◽  
Author(s):  
DSC Black
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Chelating Agents ◽  
Metal Chelates ◽  
Qualitative Consideration

2,2?-Dipyridylamine (dpa), 2-pyridyl-2-thiazolylamine (pta), 2,2?- dipyridyl sulphide (dps), 2,2?-dipyridyl sulphone (dpso), and 2,2?- dipyridylmethane (dpm) have been shown to function as bidentate chelating agents with various metal ions. A qualitative consideration of their metal complexes establishes the following stability sequence: dpa ≈ pta > dps > dpm > dpso.

Metal Complexes of Sulphur Nitrogen Chelating Agents, II. 2-Amino Cyclopentene-1-dithiocarboxylic Acid Complexes of Cu(I), Rh(I) and Hg(II)

1975 ◽  
Vol 30 (1-2) ◽  
pp. 107-111 ◽  
Author(s):  
K. Nag ◽  
D. S. Joardar
Keyword(s):  
Thermal Analysis ◽  
Metal Complexes ◽  
Magnetic Moment ◽  
Electronic Spectra ◽  
Chelating Agents ◽  
Thiol Group ◽  
Moment Measurement ◽  
Group A ◽  
Species Being ◽  
Magnetic Moment Measurement

2-Amino cyclopentene-1-dithiocarboxylic acid (ACDA) reduces Cu(II) and Rh(III) to form univalent complexes of composition Cu(ACDA), 2 H2O and Rh(ACDA) 2 H2O, the oxidised species being a dimer of ACDA. The Cu(I) may be obtained in higher yield by reacting cuprous iodide with ammonium salt of ACDA. A compound of composition Rh(ACDA) (PPh3) (H2O) is obtained by reacting ACDA with Rh(PPh3)3Cl. With Hg(II) a normal bis complex is formed. The compounds have been characterized by their infrared and electronic spectra, magnetic moment measurement and thermal analysis. In the complexes bonding occur through NH2 and deprotonated thiol group. A tentative mechanism for the formation of reduced metal complexes has been suggested.

Sulphur-nitrogen chelating agents. VI. Five- and six-coordinate complexes of 3d metal ions with an SNN tridentate ligand

1969 ◽  
Vol 22 (8) ◽  
pp. 1613 ◽  
Author(s):  
PSK Chia ◽  
SE Livinhstone
Keyword(s):  
Metal Ions ◽  
High Spin ◽  
Infrared Spectra ◽  
Magnetic Moment ◽  
Nickel Complex ◽  
Copper Complexes ◽  
Chelating Agents ◽  
Iron Complex ◽  
Tridentate Ligand ◽  
Infrared Data

Mono-ligand complexes of 6-methylpyrid-2-yl-N-(2?-methylthiophenyl)- methyleneimine (SNSMe) of the type MX2(SNNMe) (M = Mn, Fe, Co, Xi, and Cu; X = Cl, Br, I, or NCS) have been prepared. Infrared data show that in all the complexes the ligand (SNNMe) is tridentate. The electronic and infrared spectra indicate that the complexes of manganese, iron, and cobalt are five-coordinate, whereas the nickel and copper complexes are six-coordinate and polymeric. The complex CO(NO3)2(SNNMe) is six- coordinate and contains one bidentate and one unidentate nitrato group. ��� The bis-ligand complexes [N(SNNMe)2]Y2 (M = Fe, Ni, and Cu; Y = ClO4 or BF4) were also isolated. The iron complex is low-spin (μ 1.5 B.M.) but the magnetic moment of the nickel complex (μ 3.0 B.M.) is normal for high-spin octahedral nickel(II).

scholarly journals Synthesis and characterization Studies of Metal Complexes with Schiff base derived from 4-[5-(2-hydoxy-phenyl)-[1,3,4-oxadiazol-2-ylimino methyl]-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one

2016 ◽  
Vol 13 (2) ◽  
pp. 19-28
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Metal Complexes ◽  
Mass Spectra ◽  
Nmr Spectra ◽  
Electronic Spectroscopy ◽  
Synthesis And Characterization ◽  
Alcoholic Medium ◽  
Tetradentate Schiff Base ◽  
Characterization Studies

New metal complexes of the ligand 4-[5-(2-hydoxy-phenyl)-[1,3,4- oxadiazol -2-ylimino methyl]-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one (L) with the metal ions Co(II), Ni(II), Cu(II) and Zn(II) were prepared in alcoholic medium. The Schiff base was synthesized through condensate of [4-antipyrincarboxaldehyde] with[2-amino-5-(2-hydroxy-phenyl-1,3,4- oxadiazol] in alcoholic medium . Two tetradentate Schiff base ligand were used for complexation upon two metal ions of Co2+, Ni2+, Cu2+ and Zn2+ as dineucler formula M2L2.4H2O. The metal complexes were characterized by FTIR Spectroscopy, electronic Spectroscopy, elemental analysis, magnetic susceptidbility measurements, and also the ligand was characterized by 1H-NMR spectra, and mass spectra. The Structures of complexes were proposed from the measurements.

Potentiometric Titrations Involving Chelating Agents, Metal Ions, and Metal Chelates

1955 ◽  
Vol 27 (11) ◽  
pp. 1745-1749 ◽  
Author(s):  
Sidney Siggia ◽  
D. W. Eichlin ◽  
R. C. Rheinhart
Keyword(s):  
Metal Ions ◽  
Chelating Agents ◽  
Metal Chelates ◽  
Potentiometric Titrations

scholarly journals Synthesis, characterization, thermal analysis and biological study of new thiophene derivative containing o-aminobenzoic acid ligand and its Mn(II), Cu(II) and Co(II) metal complexes

2021 ◽  
Vol 35 (1) ◽  
pp. 129-140
Author(s):  
M. S. Refat ◽  
T. A. Altalhi ◽  
G. H. Al-Hazmi ◽  
J. Y. Al-Humaidi
Keyword(s):  
Thermal Analysis ◽  
Transition Metal ◽  
Benzoic Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Ions ◽  
Biological Study ◽  
Elemental Analyses ◽  
Bidentate Chelate ◽  
Anti Fungal

New ligand containing 2-(2,4-dioxo-4-thiophen-2-yl-butyrylamino)-benzoic acid (HL) merged moiety was synthesized and characterized by FT-IR, elemental analyses, mass spectra and 1H-NMR spectral. In the present study, the attempts were carried to form complexes of HL ligand with some transition metal ions (MnII, CuII and CoII) of well-defined at the (1:1) ratio of the components in the dimethyl sulfoxide (DMSO) solvent. All complexes have been studied by FTIR spectra, elemental analyses, thermal analysis, molar conductivity, electronic spectra and magnetic moment. The HL ligand produced as a bidentate chelate with interactive metal ions. All the results suggested octahedral geometry to complexes and have the formulae [M(HL)(Cl)2(H2O)2].nH2O where M = Mn(II), Cu(II) and Co(II). The IR spectra of the complexes were assigned and compared with the data in literature. The kinetic and thermodynamic results such as E*, ΔH*, ΔS* and ΔG* were calculated based o the TGA/DTG curves using Coats and Redfern and Horowitz and Metzger approximation methods. Furthermore, the resultant complexes were evaluated for the anti-bacterial and anti-fungal potential.                     KEY WORDS: 2-(2,4-Dioxo-4-thiophen-2-yl-butyrylamino)-benzoic acid, Transition metal complexes, FTIR, TGA, Antimicrobial test   Bull. Chem. Soc. Ethiop. 2021, 35(1), 129-140. DOI: https://dx.doi.org/10.4314/bcse.v35i1.11

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