Magnetic and Spectral Studies on Cobalt(II) Fluorosulfate

1971 ◽  
Vol 49 (3) ◽  
pp. 511-515 ◽  
Author(s):  
J. M. Taylor ◽  
R. C. Thompson
Keyword(s):  
Infrared Spectrum ◽  
Electronic Spectrum ◽  
Magnetic Moment ◽  
No Reduction ◽  
Electron Delocalization ◽  
Spectral Studies ◽  
Ligand Field ◽  
Ligand Environment ◽  
Free Ion ◽  
Ligand Field Parameters

The magnetic moment of cobalt(II) fluorosulfate has been measured over the temperature range 312 to 120 °K and the results agree with theory for cobalt(II) in a regular octahedral ligand environment with λ equal to the free-ion value and no reduction in the magnetic moment due to electron delocalization. From its electronic spectrum, values of the ligand-field parameters Dq and B are estimated to be 765 and 860 cm−1, respectively. The infrared spectrum shows no distortion of the fluorosulfate groups from C3v symmetry.

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.

scholarly journals Synthesis, Spectral, Magnetic and Thermal Studies of the Complexes of CoIIand NiIIWith Some Bidentate and Tridentate Hydrazone Ligands

2005 ◽  
Vol 2 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Chetan K. Modi ◽  
Ashwin S. Patel ◽  
Bharat T. Thaker
Keyword(s):  
Magnetic Moments ◽  
Picolinic Acid ◽  
Thermal Studies ◽  
Acid Hydrazide ◽  
Spectral Studies ◽  
Ligand Field ◽  
Conductivity Measurements ◽  
Octahedral Structure ◽  
Hydrazone Ligands ◽  
Ligand Field Parameters

The reaction of Co(NO3)2.6H2O and Ni(NO3)2.6H2O with hydrazones derived from 1-phenyl-3-methyl-4-acyl-5-pyrazolone (where acyl = acetyl, propionyl, butyryl and benzoyl) with 2-picolinic acid hydrazide have been studied and characterized on the basis of elemental analysis, magnetic moments, molar conductivity measurements, IR and electronic spectral studies and thermogravimetric analysis. Various ligand field parameters have been calculated. Electronic spectral data and the magnetic moment values suggest an octahedral structure for all cobalt(II) and nickel(II) complexes.

Complexes of Some Platinum Metals with p-Diethylamino Anil of Phenyl Glyoxal

1978 ◽  
Vol 33 (9) ◽  
pp. 1001-1004 ◽  
Author(s):  
H. S. Verma ◽  
R. C. Saxena
Keyword(s):  
Schiff Base ◽  
Room Temperature ◽  
Complex Compounds ◽  
The Other ◽  
Spectral Studies ◽  
Ligand Field ◽  
Octahedral Structure ◽  
Platinum Metals ◽  
Bidentate Schiff Base Ligand ◽  
Ligand Field Parameters

Complex compounds of platinum metals Ru(III), Rh(III), Os(IV), Ir(IlI) and Pt(IV) with the bidentate Schiff base ligand derived by the condensation of phenyl glyoxal with p-diethylamino aniline have been prepared and characterized. All the complexes are stable at room temperature. The complexes of Ru(III) and Os(IV) are Paramagnetic and the other complexes of Rh(III), Ir(III) and Pt(IV) are diamagnetic. The spectral studies and the calculation of ligand field parameters clearly indicate the octahedral structure of these complexes.

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.

The Coordination Chemistry of Phosphoryl Compounds Containing the — N(CH3)2 Group, Part VIII

1972 ◽  
Vol 27 (7) ◽  
pp. 759-763 ◽  
Author(s):  
M. W. G. De Bolster ◽  
W. L. Groeneveld
Keyword(s):  
Coordination Chemistry ◽  
General Formula ◽  
Ligand Field ◽  
Chemical Analyses ◽  
X Ray ◽  
Physical Measurements ◽  
Ligand Field Spectra ◽  
Chloride Adduct ◽  
Ligand Field Parameters ◽  
Group Part

A number of new solvates and adducts containing bisphenyldimethylaminophosphine oxide is reported. The solvates have the general formula M[(C6H5)2P(O)N(CH3)2]42+(anion-)2, in which M = Mg, Ca, Mn, Fe, Co, Ni, Cu, Zn and Cd, and the anions are ClO4- and BF4-. The adducts have the general formula M[(C6H5)2P(O)N(CH3)2]2Cl2, where M stands for the same series of metals.The compounds are characterized and identified by chemical analyses and physical measurements.Ligand-field and vibrational spectra have been investigated; values for the ligand-field parameters are reported. It is concluded that coordination takes place via the oxygen atom of the ligand.X-ray powder patterns were used in combination with ligand-field spectra to deduce the coordination around the metal ions.The interesting behaviour of the nickel (II) chloride adduct upon heating is discussed and it is shown that both a square pyramidal and a tetrahedral modification exists.

Ligand Field Parameters

1976 ◽  
Vol 15 (3-4) ◽  
pp. 189-199 ◽  
Author(s):  
Ivano Bertini ◽  
Dante Gatteschi ◽  
Andrea Scozzafava
Keyword(s):  
Ligand Field ◽  
Ligand Field Parameters
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