NMRfluorine19F{1H} NOEHOESYion paircinchona alkaloidphase‐transfer catalystInterionic 19F{1H} NOEs were observed in tetrabutylammonium tetrafluoroborate (1) in CDCl3 solution using both one-dimensional steady-state NOE difference experiments and a two-dimensional 19F{1H} HOESY technique. The two-...