MICROWAVE SPECTRA OF 6 MONODEUTERIOPHENOLS . MOLECULAR STRUCTURE, DIPOLE MOMENT, AND BARRIER TO INTERNAL ROTATION OF PHENOL

The microwave spectra of the six monodeuteriated phenols have been measured and a partial substitution structure of phenol has been determined. The selection rules for Class III molecules5 have been derived, and the Stark effect has been discussed. Stark coefficients for [2-D]- and [6-D]phenol have been measured and the dipole moment of phenol deduced,{A figure is presented}. Splitting data for phenol, [18O]phenol, [4-D]phenol, and [7-D]phenol were used to determine the barrier to internal rotation, V2 = 1175 ± 20 cm-1. © 1969.