Preferential solvation of a polar solute by the polar group(s) in the solvents

The rotationally averaged values of the H—H coupling constants in various polar solvents corresponding to a wide range of overall dielectric constant are reported for 1,1,2-trichloroethane. Except for very few solvents, a smooth linear relationship between the observed H—H coupling constants and x ( = (ε − 1)/(2ε + 1)) of the solvents is demonstrated and the data are interpreted as evidence for preferential solvation of 1,1,2-trichloroethane by the polar group(s) in the solvents.