Precise 19F NMR chemical shifts of CH3CF3 and CD3CF3 in the gas phase have been obtained. These shifts are linear with density and nonlinear with temperature. Thetemperature dependence is described in terms of intermolecular and intra-molecular (vibrational and rotational excitations) contributions to...
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-...