I4N-and 'H-Coupling constants, determined by ESR, ENDOR, and general-TRIPLE-resonance spectroscopy, are reported for the radical cations of tetrazinodi(heteroarenes) 1-8. The results comply with the expectation that donor properties of these compounds are mainly due to the electron-rich dihydrotetra
Endor studies of cation radicals from pharmacologically active phenothiazines
β Scribed by N. Helle; H. Kurreck; M. Bock; W. Kieslich
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 512 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
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π SIMILAR VOLUMES
The cation radical of canthaxanthin was generated electrochemically in dichloromethane and its solution ENDOR spectrum is reported for the first time. The isotropic proton hypertine coupling constants are in reasonable agreement with those calculated by RHF-INDO/SP molecular orbital methods for a pl
The cation radicals of canthaxanthin, B-carotene and S'-apo+camten-8'-al were chemically prepared on activated sihca-alumina solid supports. An ENDOR study of these cation radicals revealed the hypertine coupling constants of the methyl protons and indicated a carotenoiddependent orientation of the
Exposure of dilute solutions of CH,C=CCH3 in CCI,FCCIF2 and related solvents to ionizing radiation at 77 K produced the radical cation (CH3C=CCH3 )'. On annealing, these were initially converted into the corresponding dimer cation, c-C,( CH,
## Abstract Several methods have been established for preparing cation radicals from 1,2,4,5βtetramethoxybenzene that allow highly resolved ESR spectra to be recorded. Precise values of the hyperfine coupling constants for the aromatic and methoxy protons have been obtained; the values are 0.2268Β±0
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