An Experimental Test for the Approximation of NMR Solvent Effects by Continuum Models. 19F Gas-to-Solution Shifts of SF6 and CF4

19F gas-to-solution shifts were measured for two solute molecules (SF6, CF4) and 39 organic solvents. A correlation between the results for SF6 and CF4 is satisfactory and proves that solvent effects of both the solute molecules can be described in the same way. The present 19F shifts of SF6 are also compared with some previous gas-to-solution shifts observed for 129Xe gas and 33S in SF6. It is shown that intermolecular interactions change the shifts of external atoms (19F and 129Xe) in slightly different way than it is observed for the central atom of 33S in a SF6 molecule.