The vapor phase 2H NMR spectra of monodeuterobenzene and pentadeuterofluorobenzene were recorded at 14.1 T. Reduction of the collision time, and thus of the linewidth, was accomplished by compressing the gas to 10.8 atm with ethane. The molecules are aligned by the field of the spectrometer and, as a consequence, quadrupolar couplings are recorded. Differences from the liquid-phase spectra arise in some of the quadrupolar splittings as well as in the scalar D-F couplings. It is rationalized that the deviating quadrupolar interaction cannot be caused by interactions resulting from incomplete quenching of the rotation, but originates from environmental effects on the quadrupolar coupling in the liquid. The results agree with recent microwave experiments.