Carbon‐13–fluorine‐19 coupling constants in benzotrifluorides
- 1 October 1977
- journal article
- research article
- Published by Wiley in Magnetic Resonance in Chemistry
- Vol. 9 (10) , 589-592
- https://doi.org/10.1002/mrc.1270091008
Abstract
The carbon–fluorine coupling constants in 33 different substituted benzotrifluorides (trifluoromethyl‐benzenes) have been determined. The 3J(CF) to the ortho aromatic ring carbons varied between 1.7 and 5.6 Hz and, in a given molecule, were always larger than the 5J(CF) to the para carbon, which ranged between 0.7 and 1.7 Hz. Coupling to the meta carbons, 4J(CF), was not observed and is under 0.3 Hz.Keywords
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