Seven bond fluorine-fluorine coupling constants in dicyclobutenes
✍ Scribed by R.A Newmark; G.R Apai; H.E Romine
- Publisher
- Elsevier Science
- Year
- 1969
- Weight
- 344 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0022-2364
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## 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)
Three-bond carbon-fluorine coupling constants of 32 substituted 3-fluoropropanes and 3-fluoropropanoates were measured. From these values and from those of other alicyclic compounds already known in the literature, it can be established that the influence of molecular parameters on 'J(FC) depends on