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.

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 60. Reactions of copper(II) bromide with pyridoxal S-methylisothiosemicarbazone (PLITSC). Crystal structure of [Cu(PLITSC−H)H2O]Br•H2O

2014 ◽  
Vol 79 (3) ◽  
pp. 291-302 ◽  
Author(s):  
Vukadin Leovac ◽  
Ljiljana Vojinovic-Jesic ◽  
Sonja Ivkovic ◽  
Marko Rodic ◽  
Ljiljana Jovanovic ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Electronic Spectra ◽  
Square Planar

The synthesis and structural characterization of a square-planar copper(II) complex with pyridoxal S-methylisothiosemicarbazone (PLITSC) of the formula [Cu(PLITSC?H)H2O]Br?H2O (1) as the first Cu(II) complex with monoanionic form of this ligand were described. Complex 1 together with two previously synthesized complexes [Cu(PLITSC)Br2] (2) and [Cu(PLITSC)Br(MeOH)]Br (3) were characterized by elemental analysis, IR and electronic spectra and also by the methods of thermal analysis, conductometry and magnetochemistry.

Cobalt(II), nickel(II) and copper(II) complexes of some 2'-hydroxychalcones

1980 ◽  
Vol 33 (4) ◽  
pp. 737 ◽  
Author(s):  
M Palaniandavar ◽  
C Natarajan
Keyword(s):  
Infrared Spectra ◽  
Metal Ion ◽  
Magnetic Moments ◽  
Phenyl Group ◽  
Ligand Field ◽  
Square Planar ◽  
Spin Pairing ◽  
Square Configuration ◽  
Electron Sink ◽  
Octahedral Configuration

Metal(II) bis-chelates of the type ML2 [M = CoII, NiII, CuII; L = 2'- hydroxy-5'-X-chalcone where X = H, CH3, Cl] have been prepared and studied. Structures have been assessed by the measurement of magnetic moments, ligand field and infrared spectra and thermal properties. These chelates possess low-spin trans-square-planar configuration and show resistance to adduct formation in contrast to metal(II) chelates of β-diketones, salicylaldehyde, o-hydroxyaryl ketones and esters and o-hydroxy-crotonophenones, which have high-spin octahedral configuration. Extensive conjugation lowers the energy of the π3* orbital which enters into a very strong dπ-π3* interaction leading to spin-pairing. ��� Infrared spectra indicate that the carbonyl group is perturbed only slightly by coordination to metal. A change in metal ion affects v(C=O), v(M-O) and other vibrations and the order of stability, namely, Co ≈ Ni < Cu, inferred from these vibrations is as expected for the low-spin square configuration of the chelates. Introduction of substituents (5'-X) alters only v(M-O) significantly and the order of stability, namely, Cl > CH3 > H, derived from v(M-O) is consistent with Taft's resonance polar parameters of the substituents. All these observations are explained by the electron sink property of the phenyl group.

Near Infrared Spectra of Water in Aqueous Solutions of Organic Salts. A Solvation Study of Bu4NBr, , and

1971 ◽  
Vol 49 (12) ◽  
pp. 2008-2013 ◽  
Author(s):  
C. Jolicoeur ◽  
Nguyen Dinh The ◽  
A. Cabana
Keyword(s):  
Infrared Spectrum ◽  
Aqueous Solutions ◽  
Infrared Spectra ◽  
Near Infrared ◽  
The Other ◽  
Simple Analysis ◽  
Organic Salts ◽  
Solvent Interactions ◽  
Near Infrared Spectra ◽  
Qualitative Similarity

The near-infrared spectrum of water at various temperatures and in aqueous solutions of Bu4NBr, [Formula: see text], and [Formula: see text] is studied in the region 0.8–1.2 µ. The spectra are recorded differentially with respect to water by varying the cell lengths as to take into account density changes or the volume occupied by the solutes. A simple analysis of these spectra illustrates the qualitative similarity between the effects of the Bu4N+ ion and that of a temperature decrement on the spectrum of water. On the other hand striking differences are observed in the differential spectra obtained with Bu4NBr and the phenyl substituted: salts. Further differences are exhibited in the relative solute-solvent interactions of [Formula: see text] and [Formula: see text].

Synthesis and structure of 4-methylpyridine complexes of cobalt(II) and nickel(II) hexafluorophosphate and hexafluoroarsenate

1978 ◽  
Vol 56 (7) ◽  
pp. 985-991 ◽  
Author(s):  
Raymond M. Morrison ◽  
Robert C. Thompson
Keyword(s):  
Magnetic Properties ◽  
Field Strength ◽  
Single Crystal ◽  
Infrared Spectra ◽  
Electronic Spectra ◽  
Preliminary Report ◽  
Ligand Field ◽  
X Ray Diffraction ◽  
X Ray ◽  
Square Planar

The complexes M(4mepy)4A2 and M(H2O)2(4mepy)8A2 (where M is Ni or Co and A is PF6 or AsF6) have been prepared and their electronic spectra and magnetic properties studied. A preliminary report is made of single crystal X-ray diffraction studies on Ni(H2O)2(4mepy)8(PF6)2, Co(H2O)2(4mepy)8(PF6)2, and Co(4mepy)4(PF6)2. All of the complexes have structures involving complex cations and non-coordinated anions, consistent with extremely weak ligating abilities for both PF6− and AsF6−. Cations identified and characterized are the squashed tetrahedral [Co(4mepy)4]2+ ion, the square planar [Ni(4mepy)4]2+ ion, and the tetragonal [Co(4mepy)4((4mepy)2H2O)2]2+and [Ni(4mepy)4((4mepy)2H2O)2]2+ ions. The ligand field strength of 4-methylpyridine is found to be indistinguishable from that of pyridine in these complexes. Infrared spectra are reported and infrared criteria for establishing the presence of non-coordinated anions in PF6− and AsF6− complexes are suggested.

scholarly journals Synthesis and Spectral Characterization of Mn(II) and Co(II) Complexes with Tetradentate Macrocyclic Ligand

2021 ◽  
Vol 33 (9) ◽  
pp. 2207-2211
Author(s):  
Usha Bansal ◽  
Samta Goyal ◽  
Swati Agrawal
Keyword(s):  
Metal Complexes ◽  
Infrared Spectra ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Macrocyclic Ligand ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Metal Salts ◽  
Spectral Studies

Manganese(II) and cobalt(II) complexes were synthesized with [N4] tetradentate macrocyclic ligand using different metal salts i.e. MnCl2, Mn(NO3)2, CoCl2 and Co(NCS)2. The ligand was prepared by condensation of glyoxal and carbahydrazide. All these were characterized by elemental analysis, molar conductance measurements, magnetic moment, IR, mass, electronic and EPR spectral studies. Elemental analysis indicates that the complexes have composition MLX2 where (X = Cl–, NO3 –,NCS–). All the complexes were found to be non-electrolytic in nature so can be formulated as [MLX2]. Infrared spectra of metal complexes suggest that the ligand behaves as tetradentate. On the basis of magnetic moment, electronic and EPR spectral data, all the metal complexes were found to be high spin with octahedral geometry.

Synthesis and structural studies of iron(II) and iron(III) sulfonates

1981 ◽  
Vol 59 (4) ◽  
pp. 669-678 ◽  
Author(s):  
John S. Haynes ◽  
John R. Sams ◽  
Robert C. Thompson
Keyword(s):  
Electronic Spectra ◽  
Lattice Structure ◽  
Magnetic Moments ◽  
The Other ◽  
Antiferromagnetic Coupling ◽  
Structural Studies ◽  
Structural Isomerism ◽  
Mössbauer Data

The iron(II) sulfonates Fe(CF3SO3)2 and Fe(p-CH3C6H4SO3)2 have been prepared and on the basis of vibrational and electronic spectra and magnetic and MÖssbauer data have been assigned a layer lattice structure involving hexacoordinated iron(II) and terdentate bridging anions. The FeO6 chromophore in these compounds is distorted by a trigonal elongation along the C3 axis. Fe(CH3SO3)2 has been obtained in two isomeric forms, one having a trigonal elongation of the FeO6 chromophore, the other a trigonal compression. No structural isomerism has been found for the other iron(II) sulfonates; however, evidence for such isomerism in methanesulfonates of cobalt(II) and zinc(II) is presented. While Fe(CF3SO3)2 and Fe(p-CH3C6H4SO3)2 appear to be magnetically dilute the presence of antiferromagnetic coupling in both forms of Fe(CH3SO3)2 is indicated. The iron(III) sulfonates, Fe(CF3SO3)3, Fe(p-CH3C6H4SO3)3, and Fe(CH3SO3)3, have been prepared and all three are magnetically concentrated exhibiting magnetic moments which are significantly less than 5.92 BM and which decrease with decreasing temperature.

scholarly journals Metal Complexes of N-hydroxyethylnaphthalideneimine Schiff Base

1972 ◽  
Vol 27 (3) ◽  
pp. 304-307 ◽  
Author(s):  
R. K. Mehta ◽  
V. C. Singhi
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Magnetic Moment ◽  
Complex Molecule ◽  
Square Planar ◽  
Distorted Octahedral ◽  
Solid Complexes ◽  
Octahedral Configuration

The Schiff base, N-hydroxyethylnaphthalideneimine forms solid complexes with Mn (II) , Co (II), Ni (II), Cu (II), Zn (II), Cd (II), Pd (II) and UO2 (II). The structures of these compounds have been discussed on the basis of their elemental analysis, magnetic moment values and electronic spectral data. These studies have conclusively proved that UO2 (II) and Mn (II) complexes are octahedral in shape whereas the Cu (II) complex molecule displays a square planar or tetragonally distorted octahedral configuration. Co (II) , Ni (II) , Zn (II) and Cd (II) complexes are tetrahedral in structures while the Pd (II) compound is square planar.

Some complexes of Fe(II) with thiourea ligands

1967 ◽  
Vol 45 (10) ◽  
pp. 1135-1142 ◽  
Author(s):  
R. A. Bailey ◽  
Terry Roy Peterson
Keyword(s):  
Infrared Spectra ◽  
Sulfur Atom ◽  
Magnetic Moments ◽  
The Other ◽  
Ligand Field ◽  
Thiocyanate Ion ◽  
Ligand Field Spectra

Fe(thiourea)2(SCN)2, Fe(thiourea)4Cl2, and FeL2Cl2 (where L = methylthiourea, 1,3-dimethylthiourea, and 1,3-diethylthiourea) have been prepared and characterized. Magnetic moments and ligand field spectra indicate that all are octahedral. Infrared spectra show that the thiourea and methylthiourea ligands coordinate through the sulfur atom; the other two ligands are probably sulfur bonded also. The thiocyanate ion is coordinated through the nitrogen.

scholarly journals New complexes of Co(II), Ni(II), Cu(II) with Schiff base N,N’-bis-(3-methoxy-saliciliden)-3,3’-dimethylbenzidine

2013 ◽  
Vol 78 (7) ◽  
pp. 947-957 ◽  
Author(s):  
Ionela Alan ◽  
Angela Kriza ◽  
Olguta Dracea ◽  
Nicolae Stanica
Keyword(s):  
Schiff Base ◽  
Thermogravimetric Analysis ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Magnetic Moments ◽  
Magnetic Behaviour ◽  
Molar Ratio ◽  
Square Planar ◽  
Perchlorate Complex

The new N,N?-bis-(3-methoxy-saliciliden)-3,3?-dimetilbenzidine (H2L) Schiff base and complexes with Co(II), Ni(II) and Cu(II) of type [M(HL)Cl(H2O)] (M=Co(II), Cu(II)) [M2L(H2O)4]X2 (M=Co(II), X=ClO4 and M=Cu(II), X=NO3) and [M2L(CH3COO)2] (M=Co(II), Ni(II), Cu(II)) were synthesised. The ligand and complexes were characterized by elemental analysis, conductibility measurements, magnetic moments at room temperature, IR, NMR, UV-VIS-NIR, EPR spectra and thermogravimetric analysis. A molar ratio of 1:1 or 1:2 between ligand and metal was determined from the elemental analysis. Except for perchlorate complex that behave as electrolyte, the rest of complexes are non-electrolytes. The spectral data suggest a tetrahedral, pseudo-tetrahedral or square-planar stereochemistry respectively, data confirmed by magnetic behaviour of complexes. The antimicrobial tests indicate a fungicide effect both for ligand and complexes.

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