Electron Paramagnetic Resonance Spectra. III. Coupling Constants for Protons in Bicyclic Derivatives of Semiquinones1

1966 ◽  
Vol 88 (4) ◽  
pp. 843-844 ◽  
Author(s):  
Daniel Kosman ◽  
Leon M. Stock
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Coupling Constants ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic ◽  
Derivatives Of

scholarly journals Triarylmethyl Radicals: An EPR Study of 13C Hyperfine Coupling Constants

2017 ◽  
Vol 231 (4) ◽  
Author(s):  
Andrey A. Kuzhelev ◽  
Victor M. Tormyshev ◽  
Olga Yu. Rogozhnikova ◽  
Dmitry V. Trukhin ◽  
Tatiana I. Troitskaya ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Hyperfine Coupling ◽  
Coupling Constants ◽  
Spin Labels ◽  
Spin Probes ◽  
Paramagnetic Resonance ◽  
Hyperfine Coupling Constants ◽  
Electron Paramagnetic ◽  
Triarylmethyl Radicals

AbstractTriarylmethyl (TAM) radicals are widely used in electron paramagnetic resonance (EPR) spectroscopy as spin labels and in EPR imaging as spin probes for

The Electron Paramagnetic Resonance Spectrum of the Phenalane Anion

1972 ◽  
Vol 50 (10) ◽  
pp. 1523-1528 ◽  
Author(s):  
D. H. Paskovich ◽  
A. H. Reddoch
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectrum ◽  
Alkali Metals ◽  
Room Temperature ◽  
Resonance Spectrum ◽  
Ion Pairs ◽  
Coupling Constants ◽  
Paramagnetic Resonance ◽  
Conformational Interconversion ◽  
Electron Paramagnetic

The phenalane anion has been prepared by the reaction of alkali metals in ether solutions of both phenalane and phenalene. The electron paramagnetic resonance spectra of both the radical and of its ion pairs with sodium and with lithium in THF are reported. At room temperature there is an alternating linewidth involving the β protons caused by conformational interconversion of the axial and equatorial positions. At −80 °C the γ protons are not equivalent and the corresponding coupling constants are resolved.

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