Effect of the Hyperfine Splitting of a μ-Mesonic Atom on Its Lifetime

ESR study of the structure and bonding situation in thiocyanatocopper(II) complexes with imidazole derivatives

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19880056 ◽

1988 ◽

Vol 53 (1) ◽

pp. 56-60

Author(s):

Anna Mašlejová ◽

Reinhard Kirmse

Keyword(s):

Unpaired Electron ◽

Hyperfine Splitting ◽

Esr Spectra ◽

Ligand Field ◽

Imidazole Derivatives ◽

Bonding Parameters ◽

Monomeric Complex ◽

Structure And Bonding ◽

Frozen Solutions ◽

Planar Symmetry

ESR spectra of thianatocopper(II) complexes with imidazole derivatives were studied in ethanolic solutions at 295 and 123 K. Axialsymmetric spectra, attributed to the monomeric complex units, were obtained for the frozen solutions. The bonding parameters were interpreted by using calculated g, Cu-hyperfine, and 14N-ligand hyperfine splitting values. The Cu-N bond parameters indicate a considerable delocalization of the unpaired electron. The values of the isotropic Cu-hyperfine splitting suggest that the deviations from the planar symmetry of the CuN4 units are due to tetrahedral perturbation of the ligand field.

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Association of radical anion with alkali cations. IV. ESR study of the 4-nitrobenzophenone radical anion

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19800369 ◽

1980 ◽

Vol 45 (2) ◽

pp. 369-375 ◽

Cited By ~ 2

Author(s):

Stanislav Miertuš ◽

Ondrej Kyseľ

Keyword(s):

Hyperfine Splitting ◽

Radical Anion ◽

Esr Spectroscopy ◽

Supporting Electrolyte ◽

Esr Spectra ◽

Proton Donor ◽

Alkali Cations

The 4-nitrobenzophenone radical anion prepared by electrolysis was studied by ESR spectroscopy. On the basis of the interpretation of ESR spectra, the conformation of this system was estimated. The effect of the concentration of supporting electrolyte and of the presence of a proton-donor agent (C2H5OH) was examined. It is assumed that changes in hyperfine splitting constants are caused by association.

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