Abstract
The single-crystal and powder 2H NMR spectra of the hydroquinone/CD 3OH clathrate recorded at T<13 K reveal features characteristic of rotational tunneling of the CD 3 groups. The ground-state tunnel splitting v t is larger than 2 MHz. Satisfactory agreement between simulated and recorded spectra is obtained if the angle between the C 3 axis of the CD 3 group and the C—D bond directions is taken to be 2° larger than the tetrahedral angle. The line intensities in the single-crystal spectra show an oscillatory dependence on the pulse separation of the quadropolar echo sequence.
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