We are having some problems with interpreting our 13C NMR spectra of some fluorinated sulfonamides. Both p-CF3 and 3,5-di-CF3-aryl. We are seeing too many peaks and are wondering if we should see 2, 3 and 4 bond coupling to F in our 13C resonances. We see a quartet for the CF3, and then doublets (or doubled peaks). Sorry this is a vague description. Any thoughts or advise?