Coordination compounds of substituted 1,10-phenanthrolines and related dipyridyls. X. Complexes of iron, cobalt, and nickel, and 4,6,4',6'-Tetramethyl-2,2'-bipyridine

1966 ◽  
Vol 19 (2) ◽  
pp. 201 ◽  
Author(s):  
JR Hall ◽  
MR Litzow ◽  
RA Plowman
Keyword(s):  
Magnetic Susceptibility ◽  
Absorption Spectra ◽  
Coordination Compounds ◽  
Conductivity Measurements ◽  
Visible Absorption ◽  
Iron Cobalt ◽  
Cobalt And Nickel

The following complexes of 4,6,4',6'-tetramethyl-2,2'-bipyridine (tmb) have been prepared: MCl2 tmb, where M = Fe, Co, and Ni; M(NO3)2 tmb,H2O, where M = Fe and Co; [CoNO3 tmb2]ClO4; and Ni tmb2 (NO3)2,H2O. The structures of these compounds have been determined, as far as possible, by means of magnetic susceptibility and conductivity measurements, and by studies of their infrared and visible absorption spectra.

ABSORPTION SPECTRA AND CONFIGURATION OF SOME AMINE COMPLEXES OF COPPER (II) ACETATE

1966 ◽  
Vol 44 (8) ◽  
pp. 895-898 ◽  
Author(s):  
Gopal Narain
Keyword(s):  
Molecular Weight ◽  
Absorption Spectra ◽  
Coordination Complexes ◽  
Single Band ◽  
Aliphatic Amines ◽  
Conductivity Measurements ◽  
Visible Absorption ◽  
Amine Complexes ◽  
Constituent Elements ◽  
Absorption Measurements

Coordination complexes of copper(II) acetate, ammonia, aliphatic amines, and pyridine have been prepared. Molecular formulae on the basis of percentage of constituent elements were found to be Cu(OAc)2(am)2, where OAc represents acetate ion and am any amine used. Conductivity measurements in nitrobenzene and formamide indicate that the complexes are nonelectrolytes and thus it is suggested that acetate ions are also coordinated. Molecular weight measurements in the same solvents confirm this. Visible absorption measurements in formamide show a single band at about 635 mμ.

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.

Spin ordering contribution of iron, cobalt, and nickel impurity electron states, to the low-temperature magnetic susceptibility of mercury selenide crystals

2015 ◽  
Vol 41 (2) ◽  
pp. 154-156 ◽  
Author(s):  
T. E. Govorkova ◽  
A. T. Lonchakov ◽  
V. I. Okulov ◽  
M. D. Andriichuk ◽  
A. F. Gubkin ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Low Temperature ◽  
Iron Cobalt ◽  
Electron States ◽  
Spin Ordering ◽  
Mercury Selenide ◽  
Cobalt And Nickel

Coordination compounds of substituted 1,10-phenanthrolines and related bipyridyls. XII. Complexes of copper(I), silver(I), and nickel(II) with 2-Methyl-1,10-phenanthroline

1970 ◽  
Vol 23 (4) ◽  
pp. 699 ◽  
Author(s):  
EW Ainscough ◽  
RA Plowman
Keyword(s):  
Magnetic Susceptibility ◽  
Solid State ◽  
Coordination Compounds ◽  
Nickel Complexes ◽  
Hot Water ◽  
Conductivity Measurements ◽  
Hypophosphorous Acid ◽  
Dimeric Structure ◽  
Donor Nitrogen ◽  
Reflectance Measurements

Copper(1) salts of the type Cu(mep)2X (X = NO3, ClO4) (mep = 2-methyl- 1,l0-phenanthroline) were obtained by boiling the appropriate bis copper(11) complex in water or by reduction with hypophosphorous acid. They are expected to have a tetrahedral arrangement of donor nitrogen atoms about the copper(1) ion. Complexes Cu(mep)X (X = Br,I) were obtained by reduction of the appropriate copper(11) salt in hot water with hypophosphorous acid. These may be dimeric in the solid state with a tetrahedral arrangement of the ligand donor atoms. Complexes of the type Ag(mep)2X (X = NO3,ClO4) were prepared and are believed to be tetrahedrally coordinated. Ag(mep)Br was also prepared and in the solid state may be a dimeric structure involving the bromo ligand as the bridging unit. Nickel complexes of the type Ni(mep)X2 (X = Cl, NO3) and Ni(mep)2X2,yH2O (X = Cl, y = 4; X = NO3, y = �) were prepared and structures determined as far as possible by means of magnetic susceptibility and conductivity measurements, and by infrared and reflectance measurements.

Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. V. Complexes of cobalt and 2,9-Dimethyl-1,10-phenanthroline

1965 ◽  
Vol 18 (5) ◽  
pp. 691 ◽  
Author(s):  
DB Fox ◽  
JR Hall ◽  
RA Plowman
Keyword(s):  
Absorption Spectra ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Magnetic Moments ◽  
Visible Absorption

A series of complexes of cobalt(II) and 2,9-dimethyl-1,10-phenanthroline (dmp) has been prepared. Complexes of formula CoX2dmp (X = Cl, Br, I, KCS) are monomeric in acetone and camphor and non-electrolytes in nitrobenzene and nitromethane. The magnetic moments and visible absorption spectra favour the assignment of tetrahedral stereochemistry about the Co atom. Complexes containing 2 moles dmp per Co appear to have octahedral arrangements of ligands about the Co atom. These are of the type [CoNO3(H2O)dmp2]X, (X = NO3, ClO4, BPh4) and Co(NCS)2dmp2. The magnetic moments, visible and infrared spectra, and conductances in nitrobenzene and nitromethane support this conclusion. With other mono-dmp complexes (CoX2dmp, X = NO3, �SO4) and bis-dmp complexes {CoXdmp,ClO4,H2O (X = Cl, Br) ; Codmp2(ClO4)2}, stereochemical assignments could not be made.

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