NUCLEAR MAGNETIC RESONANCE SPECTRA OF 6 ORTHO-SUBSTITUTED FLUOROBENZENES

The proton and fluorine nuclear magnetic resonance parameters have been determined for six ortho-substituted fluorobenzenes. The chemical shifts for the protons adjacent to the ortho substituents were found to follow the Q parameter correlation quite well, and there was also a fair correlation of Q with the fluorine chemical shifts. The nitro group provides an exception in both series which is taken to indicate that the nitro group is somewhat out of the plane of the aromatic ring on the average of the nmr time scale for o-nitrofluorobenzene.