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Carbon-13–fluorine-19 coupling constants in benzotrifluorides

✍ Scribed by Richard A. Newmark; James R. Hill

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
362 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The carbon–fluorine coupling constants in 33 different substituted benzotrifluorides (trifluoromethyl‐benzenes) have been determined. The ^3^J(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 ^5^J(CF) to the para carbon, which ranged between 0.7 and 1.7 Hz. Coupling to the meta carbons, ^4^J(CF), was not observed and is under 0.3 Hz.

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