The FIB nmr shielding parameters for twenty-one m-substituted fluorobenzenes relative to a fixed external standard and relative to fluorobenzene as an internal standard have been obtained at room temperature at high dilution in twenty widely varying pure solvents. Extensive measurements with twenty-four additional substituent groups in non-polar and in hydroxylic solvents, both pure and mixed, have also been made. In spite of a variation ...
