In dimethylformamide the ESR spectra of the radical anions of dibenzoCf,h]quinoxaline and dibenzo[a,c]phenazine both exhibit line broadening due to slow molecular tumbling over a wide temperature range. Similar effects are also observed in the spectra of the radical anions of quinoxaline and phenazi
Electron spin resonance studies of several anion radicals of nitro-substituted thioacylpiperidines and morpholines
✍ Scribed by C. Cercasov; F. Cornea; M. Ciureanu; M. Hillebrand; V. E. Sahini; E. Volanschi
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 398 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The radical anions of m‐ and p‐ nitro‐substituted derivatives of several classes of N‐(thioacyl)‐piperidines and ‐morpholines have been studied by ESR spectroscopy. The anion radicals were found to be centred on the nitro group, and the distribution of the unpaired electron was found to be dependent on the extent of conjugation between the thiocarbonyl group and the aromatic moiety of the molecule. The hfs constants were discussed in terms of the spin densities calculated by the McLachlan procedure.
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