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Ultra long range 19F19F spin–spin coupling

✍ Scribed by Peter J. Mitchell; Lawrence Phillips; Stephen J. Roberts; Victor Wray

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
188 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The observation of long range (10–14 bond) spin–spin coupling between fluorine nuclei (which are very far apart in space) is used to provide information about electronic interactions in bridged dinuclear aromatic compounds.

📜 SIMILAR VOLUMES

Interbenzylic 19F,19F spin-spin coupling
Interbenzylic 19F,19F spin-spin coupling constants in bis(fluoromethyl) arenes
✍ Ludger Ernst; Sabine Pulmann 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 174 KB

## Abstract Five‐ to eleven‐bond F,F spin coupling is observed in bis(fluoromethyl)arenes. According to INDO MO calculations, these couplings are transmitted mainly via the aromatic π‐system. The low preference of 1,4‐(CH~2~F)~2~‐benzene for the conformation in which the CF bonds are perpendicular

Signs of proximate 31P, 19F and 19F, 19F
Signs of proximate 31P, 19F and 19F, 19F spin–spin coupling constants in 2-trifluoromethylphenyldifluorophosphine
✍ Ted Schaefer; Kirk Marat; Alberta Lemire; Alexander F. Janzen 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 195 KB

## Abstract In 2‐trifluoromethylphenyldifluorophosphine the proximate couplings ^4^__J__(^19^F^31^P) and ^5^__J__(^19^F^19^F) are + 68.3 and + 8.3 Hz, respectively. ^1^__J__(^13^C^31^P) is −57.0 Hz, ^2^__J__(^13^C‐1, ^10^F) is + 9.9 Hz and ^2^__J__(^13^C‐6, ^13^C‐6, ^31^P) is + 10.1 Hz. The trifluo

Signs of 1H, 19F spin—spin couplings in
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✍ Ted Schaefer; Kirk Marat 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 147 KB

## Abstract The signs of the spin–spin coupling constants between the aldehydic proton and the fluorine nuclei in pentafluorobenzaldehyde are negative over four and six formal bonds and positive over five bonds. The opposite signs had been assumed in previous studies of this molecule. The correct s

Signs of 19F1H and 19F13C spin–spin coup
Signs of 19F1H and 19F13C spin–spin coupling constants mainly transmitted through space
✍ I. D. Rae; J. A. Weigold; R. H. Contreras; G. Yamamoto 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 397 KB

## 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