The four isomeric diÑuoro-2,11-dithia [ 3.3 ] paracyclophanes, with one Ñuorine substituent per aromatic ring 3F 2 , were prepared as a 1 :1 :1 :1 mixture. They were converted into the bissulphones, which were pyrolysed to yield the ar,arº-diÑuoro [ 2.2 ] paracyclophanes, as a mixture of pseudogemin
An experimental study of19F-19F and13C-19F spin-spin coupling in molecules of difluoro(fluorosulfonyl)- and difluoro(fluorosulfonyloxy)acetyl fluorides
✍ Scribed by G. A. Emel’yanov; V. I. Polyanskii; D. M. Kostycheva; L. V. Osetrova; V. M. Rodin; E. E. Shchadilova
- Book ID
- 111463552
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 2011
- Tongue
- English
- Weight
- 241 KB
- Volume
- 84
- Category
- Article
- ISSN
- 1070-4272
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## Abstract The details of two‐dimensional ^13^C^1^H correlated spectra have provided information about the relative signs of __J__(C, F) and __J__(F, H) for several molecules in which C, F and H are mutually coupled. Unlike signs are found for __J__(C, F) and __J__(F, H) when the coupling pathway
## Abstract The signs of all ^13^C^19^F and ^1^H–^19^F coupling constants in fluorobenzene, some substituted derivatives, and in 2‐fluoropyridine have been related using single‐frequency ^13^C{^1^H} double resonance techniques. All ^13^C^19^F couplings in these compounds are shown to be positive
The 1H, 13C and 19F NMR spectra of 9, 14-diÑuoro-2,11-dithia[3.3]metaparacyclophane, and 3F 2 , its 9-monoÑuoro derivative, 3F, and of 8,12-diÑuoro[2.2]metaparacyclophane, and its 8-monoÑuoro deriv-2F 2 , ative, 2F, were experimentally assigned as fully as possible. Two-dimensional shift correlation