Infrared and Electronic Spectral Studies of Cobalt(II) and Nickel(II) Complexes of N-Allyl Urea and N-Allyl Thiourea

1972 ◽  
Vol 50 (16) ◽  
pp. 2603-2609 ◽  
Author(s):  
P. P. Singh ◽  
I. M. Pande
Keyword(s):  
Magnetic Susceptibility ◽  
Electronic Spectra ◽  
Electrical Conductance ◽  
Spectral Studies ◽  
Ligand Field ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Halide Complexes ◽  
Ligand Field Parameters ◽  
Allyl Thiourea

Complexes of N-allyl urea (NAU) and N-allyl thiourea (NATU) with cobalt (II) and nickel (II) halides and perchlorates have been prepared and characterized by electrical conductance, magnetic susceptibility, infrared and electronic spectra. Infrared spectra suggest coordination in NAU through oxygen and in NATU through nitrogen. The electronic spectra and magnetic susceptibility data indicate tetrahedral and octahedral stereochemistry for cobalt (II) and nickel (II) halide complexes, respectively. The various ligand field parameters Dq, B′, and β calculated for these complexes show about 25 and 11% covalency for Co (II) and Ni (II), respectively, and suggest a weak ligand field.

Infrared and electronic spectral studies of 2-thiazolidinethione complexes of Co(II) halides

1968 ◽  
Vol 46 (14) ◽  
pp. 2361-2368 ◽  
Author(s):  
P. P. Singh ◽  
R. Rivest
Keyword(s):  
Magnetic Susceptibility ◽  
Spectral Study ◽  
Spectral Studies ◽  
Ligand Field ◽  
Infrared Spectral ◽  
Halide Complexes ◽  
Probable Site ◽  
Ligand Field Parameters ◽  
Electronic Spectral Study

Cobalt(II) halide complexes [CoX2•2L] (X = Cl, Br, I and L = 2-thiazolidinethione) and [CoL4] (ClO4)2 have been prepared. The infrared spectral study suggests that the probable site of bonding in the ligand is nitrogen. The results of electronic spectral study and magnetic susceptibility measurements indicate that the complexes are tetrahedral in structure. The various ligand field parameters Dq, B′, and β show about 80% covalency in the complexes and suggest a weak ligand field.

scholarly journals Spectroscopic studies of benzoxazole-2-thione complexes. Derivatives of cobalt(II) and nickel(II) halides

1976 ◽  
Vol 54 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Carlo Preti ◽  
Giuseppe Tosi
Keyword(s):  
Magnetic Susceptibility ◽  
Ir Spectra ◽  
Electronic Spectra ◽  
Spectroscopic Studies ◽  
Ligand Field ◽  
Conductivity Measurements ◽  
Derivatives Of ◽  
Ligand Field Parameters ◽  
Cobalt And Nickel

The preparation of some complexes of benzoxazole-2-thione with halides of cobalt(II) and nickel(II) is reported. The complexes of cobalt(II) and nickel(II) are tetrahedral of the type ML2X2 with the exception of NiLBr2. The complexes have been studied by means of magnetic susceptibility measurements, infrared and far ir spectra, electronic spectra, and conductivity measurements. The ligand behaves as monodentate N-bonded. The various ligand field parameters, Dq, B′, and β show about 60 and 80% of covalency in the cobalt(II) and nickel(II) complexes respectively and suggest a medium strong ligand field. The spectroscopy parameters of cobalt and nickel derivatives confirm the presence of CoN2X2 and NiN2X2 chromophores.

Determination of ligand field splitting in lanthanide(iii) monoporphyrinato complexes

2019 ◽  
Vol 48 (22) ◽  
pp. 7685-7692 ◽  
Author(s):  
Anas Santria ◽  
Akira Fuyuhiro ◽  
Takamitsu Fukuda ◽  
Naoto Ishikawa
Keyword(s):  
Magnetic Susceptibility ◽  
Electronic Structures ◽  
Ligand Field ◽  
Field Splitting ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Ground Multiplet

The 4f-electronic structures of the ground multiplet states of a series of [Ln(TPP)(cyclen)]Cl (Ln = Tb, Dy, Ho, Er, Tm, and Yb; TPP = 5,10,15,20-tetraphenylporphyrinato; cyclen = 1,4,7,10-tetraazacyclododecane) have been determined using experimental NMR and magnetic susceptibility data.

Transition metal complexes of deprotonated 2-mercaptobenzoxazole. Study of the thiol–thioketo form equilibrium

1977 ◽  
Vol 55 (8) ◽  
pp. 1409-1414 ◽  
Author(s):  
Carlo Preti ◽  
Giuseppe Tosi
Keyword(s):  
Magnetic Susceptibility ◽  
Ir Spectroscopy ◽  
Transition Metal ◽  
Chemical Analysis ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Electronic Spectra ◽  
Ligand Field ◽  
Ligand Field Parameters

Complexes of 2-mercaptobenzoxazole (mbo) with Zn(II), Cd(II), Hg(II), Cu(I), Ag(I), Au(I), Ni(II), Pd(II), Pt(II), Co(II), Rh(III), and Ir(III) were prepared and characterized. Their structures have been assigned on the basis of chemical analysis, ir and far ir spectroscopy, electronic spectra, and magnetic susceptibility measurements. The ligand always bonds through both the sulphur and the nitrogen heteroatoms. The ligand field parameters have been evaluated and are in keeping with the proposed structures confirming the presence of MS2N2 and MS3N3 chromophores.

Donor properties of 2-aminothiazole and 2-acetylaminothiazole towards cobalt(II) halides

1974 ◽  
Vol 27 (3) ◽  
pp. 509 ◽  
Author(s):  
PP Singh ◽  
AK Srivastava
Keyword(s):  
Magnetic Susceptibility ◽  
Infrared Spectra ◽  
Electronic Spectra ◽  
Point Group ◽  
Carbonyl Oxygen ◽  
Ligand Field ◽  
Tetrahedral Configuration ◽  
X Ray ◽  
Ligand Field Parameters

Molecular addition complexes of the type CoL2X2 (X = Cl, Br, I and L = 2-aminothiazole and 2-acetylaminothiazole) have been prepared and studied by infrared spectra, electronic spectra, magnetic susceptibility and X-ray powder data. Infrared and electronic spectra suggest coordination through exocyclic nitrogen in 2-aminothiazole and through carbonyl oxygen in 2-acetylaminothiazole. The complexes have tetrahedral configuration and belong to the C2" point group. Ligand field parameters Dq, B' and β show more covalency in 2-aminothiazole complexes than in 2-acetylamino-thiazole complexes and suggest a weak ligand field for both the ligands.

scholarly journals Molecular Mechanics and Quantum Chemistry Based Study of Nickel-N-Allyl Urea andN-Allyl Thiourea Complexes

2009 ◽  
Vol 6 (3) ◽  
pp. 753-758
Author(s):  
P. D. Sharma ◽  
Shruti Srivastava ◽  
P. P. Singh
Keyword(s):  
Quantum Chemistry ◽  
Molecular Mechanics ◽  
Electronic Spectra ◽  
Population Analysis ◽  
Ligand Field ◽  
Eigenvalues And Eigenvectors ◽  
Eigenvector Analysis ◽  
Overlap Matrix ◽  
Ligand Field Parameters ◽  
Allyl Thiourea

Eigenvalue, eigenvector and overlap matrix of nickel halide complex ofN-allyl urea andN-allyl thiourea have been evaluated. Our results indicate that ligand field parameters (Dq, B’ andβ) evaluated earlier by electronic spectra are very close to values evaluated with the help of eigenvalues and eigenvectors. Eigenvector analysis and population analysis shows that in bonding 4s, 4p, and 3dx2-y2, 3dyzorbitals of nickel are involved but the coefficient values differ in different complexes. Out of 4px, 4py, 4pzthe involvement of either 4pzor 4py, is noticeable. The theoretically evaluated positions of infrared bands indicate thatN-allyl urea is coordinated to nickel through its oxygen andN-allyl thiourea is coordinated to nickel through its sulphur which is in conformity with the experimental results.

scholarly journals Collective Magnetic Behavior of 11 nm Photo-Switchable CsCoFe Prussian Blue Analogue Nanocrystals: Effect of Dilution and Light Intensity

2021 ◽  
Vol 7 (7) ◽  
pp. 99
Author(s):  
Linh Trinh ◽  
Eric Rivière ◽  
Sandra Mazerat ◽  
Laure Catala ◽  
Talal Mallah
Keyword(s):  
Magnetic Susceptibility ◽  
Light Intensity ◽  
Prussian Blue ◽  
Magnetic Behavior ◽  
Magnetic Interaction ◽  
Light Irradiation ◽  
Prussian Blue Analogue ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data

The collective magnetic behavior of photoswitchable 11 nm cyanide-bridged nanoparticles based of the Prussian blue analogue CsCoFe were investigated when embedded in two different matrices with different concentrations. The effect of the intensity of light irradiation was studied in the less concentrated sample. Magnetization studies and alternating magnetic susceptibility data are consistent with a collective magnetic behavior due to interparticle dipolar magnetic interaction for the two compounds, even though the objects have a size that place them in the superparamagnetic regime.

Magnetic Properties of Liquid Crystals Incorporating Metal Centres

1989 ◽  
Vol 175 ◽  
Author(s):  
Wolfgang Haase ◽  
Stefan Gehring ◽  
Bettina Borchers
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Liquid Crystals ◽  
Molecular Interactions ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Magnetic Effects ◽  
Diamagnetic Anisotropy

AbstractMagnetic susceptibility data (300–520 K) of monomeric and dimeric mesogenic copper(II) compounds are presented. Different magnetic effects arising from the paramagnetic Cu(II)-centres and the diamagnetic anisotropy of the mesogenic groups are observed and discussed with respect to possible inter molecular interactions.

The reliability of magnetic susceptibility data obtained with the Gouy method

1969 ◽  
Vol 2 (11) ◽  
pp. 970-972 ◽  
Author(s):  
J G J Sloot ◽  
C H Massen ◽  
J A Poulis
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data
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