THE CORRELATION OF ABSORPTION SPECTRA AND STRUCTURE OF PSEUDO-OCTAHEDRAL AND TRIGONAL BIPYRAMIDAL COPPER(II)–1,10-PHENANTHROLINE COMPLEXES IN ACETONE SOLUTIONS

1966 ◽  
Vol 44 (18) ◽  
pp. 2165-2171 ◽  
Author(s):  
G. H. Faye
Keyword(s):  
Field Theory ◽  
Absorption Spectra ◽  
Ligand Field ◽  
Octahedral Symmetry ◽  
Ligand Field Theory ◽  
Trigonal Bipyramidal ◽  
Ammonia Complex ◽  
Bipyramidal Structure

By the use of elementary ligand field theory to interpret the absorption spectra of complexes formed in the copper(II)–1,10-phenanthrolene (Phen) system in an acetone medium, it has been shown that the mono-Phen complex is of approximately octahedral symmetry and the bis-Phen complex probably has a trigonal bipyramidal structure. At high Phen concentration, a tris-complex is formed that is probably trigonally distorted from octahedral symmetry. The results of the present work suggest that the "pentammine effect" observed in spectra of the copper(II)–ammonia complex is due to the formation of a trigonal bipyramidal complex.

Correlation of absorption spectra and structure of some Co(II)– and Ni(II)–2,2′-biquinoline complexes

1967 ◽  
Vol 45 (20) ◽  
pp. 2335-2345 ◽  
Author(s):  
G. H. Faye ◽  
J. L. Horwood
Keyword(s):  
Field Theory ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Transition ◽  
Near Infrared ◽  
Magnetic Measurements ◽  
Electronic Absorption Spectra ◽  
General Interest ◽  
Ligand Field ◽  
Ligand Field Theory

Co(II)– and Ni(II)–2,2′-biquinoline (Biq) complexes of the type MBiqCl2 and MBiq(NO3)2 have been isolated. Electronic absorption spectra in the visible and near infrared, as well as magnetic measurements, show that CoBiqCl2 is essentially tetrahedral, whereas NiBiqCl2 and the MBiq(NO3)2 complexes are pseudo-octahedral. In acetone solution Co(II) forms a bis-Biq complex that is probably five coordinate, whereas the Ni(II) analogue is probably an octahedral species with a cis configuration. Elementary ligand field theory has been used to interpret the absorption spectra, and certain electronic transition assignments have been made that may be of general interest.

CO-ORDINATION COMPOUNDS OF NICKEL(II): PART I. THE SPECTRA OF SALICYLALDIMINE DERIVATIVES OF NICKEL(II) IN SOME ORGANIC SOLVENTS

1959 ◽  
Vol 37 (2) ◽  
pp. 436-443 ◽  
Author(s):  
H. C. Clark ◽  
R. J. O'Brien
Keyword(s):  
Field Theory ◽  
Carbon Tetrachloride ◽  
Absorption Spectra ◽  
Organic Solvents ◽  
Ligand Field ◽  
Temperature Dependent ◽  
Visible Absorption ◽  
Ligand Field Theory ◽  
Recent Developments ◽  
Derivatives Of

Measurements of the ultraviolet and visible absorption spectra of bis-N-methyl-salicylaldimine nickel(II) and its 5-chloro and 5-bromo derivatives in benzene, chloroform, carbon tetrachloride, and cyclohexane solutions at temperatures between 15° and 45 °C are reported. The results confirm the occurrence of a temperature dependent equilibrium between dia- and para-magnetic forms. The nature of the paramagnetic form is discussed in terms of the recent developments of the ligand field theory. The effect on the equilibrium of substitution of chlorine or bromine in the five position of the salicylaldehyde molecule is also discussed.

Lie groups and unitary transformations in ligand field theory

1983 ◽  
Vol 23 (1) ◽  
pp. 169-183 ◽  
Author(s):  
Chia-Chung Sun ◽  
Yan-De Han ◽  
Be-Fu Li ◽  
Qian-Shu Li
Keyword(s):  
Field Theory ◽  
Lie Groups ◽  
Ligand Field ◽  
Ligand Field Theory ◽  
Unitary Transformations

A ligand field theory-based methodology for the characterization of the Eu 2+ [Xe]4f 6 5d 1 excited states in solid state compounds

2015 ◽  
Vol 622 ◽  
pp. 120-123 ◽  
Author(s):  
Amador García-Fuente ◽  
Fanica Cimpoesu ◽  
Harry Ramanantoanina ◽  
Benjamin Herden ◽  
Claude Daul ◽  
...  
Keyword(s):  
Field Theory ◽  
Solid State ◽  
Excited States ◽  
Ligand Field ◽  
Ligand Field Theory ◽  
The Eu
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