Determination of Hyperfine Coupling Constants of Fluorinated Diphenylacetylene Radical Anions by Magnetic Field-Affected Reaction Yield Spectroscopy

2018 ◽  
Vol 123 (2) ◽  
pp. 505-516
Author(s):  
Victoria A. Sannikova ◽  
Maria P. Davydova ◽  
Peter S. Sherin ◽  
Simon V. Babenko ◽  
Valeri V. Korolev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hyperfine Coupling ◽  
Coupling Constants ◽  
Reaction Yield ◽  
Radical Anions ◽  
Hyperfine Coupling Constants

A Paramagnetic Resonance Study of Unhindered Biphenyl Anion Radicals (III)

1971 ◽  
Vol 49 (21) ◽  
pp. 3529-3535 ◽  
Author(s):  
F. C. Adam ◽  
C. R. Kepford
Keyword(s):  
Hyperfine Coupling ◽  
Coupling Constants ◽  
Correlation Diagram ◽  
Radical Anions ◽  
Paramagnetic Resonance ◽  
Hyperfine Coupling Constants ◽  
Anion Radicals

The radical anions of biphenyl and some of its bridged derivatives have been studied by e.s.r. It is found that the proton hyperfine coupling constants change monotonically through the series of radical anions derived from biphenyl, 9,10-dihydrophenanthrene, fluorene, dibenzothiophene, and dibenzofuran. Deuterations have been carried out for the latter two compounds and the hyperfine coupling constants are assigned to specific positions in these anions. The data are displayed in the form of a correlation diagram from which assignments for other bridged biphenyl anions can be made.

E.P.R. studies of the anions of some peri-alkylnaphthalenes

1972 ◽  
Vol 25 (11) ◽  
pp. 2353 ◽  
Author(s):  
RFC Claridge ◽  
BM Peake
Keyword(s):  
Electron Spin Resonance ◽  
Molecular Orbital ◽  
Electron Spin ◽  
Hyperfine Coupling ◽  
Inductive Effect ◽  
Coupling Constants ◽  
Radical Anions ◽  
Hyperfine Coupling Constants ◽  
Spin Resonance ◽  
Aliphatic Substituent

The hyperfine coupling constants for the radical anions of 2,3-dihydro- phenalene (perinaphthane) and 7,8,9,l0-tetrahydrocyclohepta[de]naphthalene have been determined from analysis of the electron spin resonance spectra in solution. The results are compared with data from other mono- and di-peri- substituted naphthalenes. A simple H�ckel molecular orbital treatment is used to describe the inductive effect of the aliphatic substituent.

scholarly journals Electron Paramagnetic Evidence for the ·pf3 Radical Anion

2000 ◽  
Vol 2000 (7) ◽  
pp. 342-343 ◽  
Author(s):  
Martyn C.R. Symons
Keyword(s):  
Radical Anion ◽  
Hyperfine Coupling ◽  
Coupling Constants ◽  
Radical Anions ◽  
Epr Spectrum ◽  
Hyperfine Coupling Constants ◽  
Spectroscopic Evidence ◽  
The Third ◽  
Electron Paramagnetic

Although ·PF2 radicals have been extensively studied there does not seem to be any spectroscopic evidence for ·PF3-radical anions. Here it is proposed that an EPR spectrum previously assigned to ·PF2 radicals is almost certainly due to ·PF3-centres. The 31P and 19F hyperfine coupling constants for these radicals are expected to be very similar. However, the ·PF3-radicals should show an extra coupling to the third 19F nucleus. This is clearly present.

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