ESR, ENDOR and triple resonance studies of 1,4-dihydro-1,3-diphenyl-(la) and 3-tert-butyl-1,4dihydro-lphenyl-l,2,4benzotriazinyl (2a) and of the corresponding radical cation 3a (2a protonated at N-4) yielded the magnitude and the sign of almost all of the 'H and I4N hyperfine coupling (HFC) constant
Comparative endor and triple resonance studies on 1,4-dimethylnaphthalene and anti[2.2](1,4)naphthalenophane anion radicals
✍ Scribed by V. Hamacher; M. Plato; K. Möbius
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 474 KB
- Volume
- 125
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
From chemically generated anion radicals of anti2.2naphthalenophane and 1,4_dimethylnaphthalene, hyperfine coupling constants including relative signs are determined by ENDOR and TRIPLE resonance. The data are compared with spm density distributions obtained by MO calculations. The results are discussed with respect to the spin density distribution in the "special pair" primary donor of bacterial photosynthesis.
📜 SIMILAR VOLUMES
The radical anion of 1,2:9,10-dibenzo[2,2]paracyclophane (3) has been studied by ESR, ENDOR, and TRIPLE resonance spectroscopy under a variety of experimental conditions. The coupling constants of the eight protons in the deck-benzene rings, and of the four inner and four outer protons in the side-b
## Abstract The relative signs and absolute values of the hyperfine coupling constants of different methoxy‐1,4‐benzoquinones were measured by ESR, ENDOR and TRIPLE resonance spectroscopy. Reactions of 1,4‐benzoquinone and 1,4‐hydroquinone with methanol took place in alkaline methanol, giving rise
Multiple resonance spcclra were oblained from lhe radical anion or perfluoro4.4'-bipyridyl in lelrahqdrofuran witi polassium as counlerion Fluorine absorptions were observed in lhe ENDOR speclrum with hyperfine wupling ~nslanl~ of 0.596 and 0.105 mT\_ A general TRIPLE experiment showed lhem lo be op