If you simply put a solid in a regular NMR tube and run the spectrum on a conventional high resolution NMR spectrometer, what will you get? The answer may surprise you.
One gets sharp lines in the NMR spectra of liquids (or solutions) because the rapid isotropic motion of the molecules averages out dipolar interactions, chemical shielding anisotropy and quadrupolar coupling, all of which can broaden NMR resonances. In rigid solids, there is no isotropic motion and the interactions mentioned above will broaden out the NMR resonances to the point where they will lost in the baseline of typical spectral widths employed for solution state NMR. So, for rigid solids, you are likely to see nothing. Despite what many people believe, all solids are not rigid. Many exhibit some type of molecular motion (eg. methyl group rotation, phenyl ring flips, rotation about eta bonds etc...). Some compounds called "plastic crystals" even exhibit isotropic motion. An example of such a compound is adamantane. The bottom trace of the figure below shows a conventional solution state 13C NMR spectrum of adamantane with proton decoupling. The top trace shows the spectrum of the solid acquired in exactly the same way. Although the resolution for the solid is not as good as that for the the solution, one can still resolve the two types of carbon.