High resolution broad line 13C NMR and relaxation in solid norbornadiene

High resolution NMR of rare spins in solids has been used for selective measurement through transverse relaxation of the shapes of lines corresponding to nonequivalent ¹³C nuclei in solid norbornadiende between 195 and 225 K. The broad lines have different shapes and widths, whose temperature dependence indicates slow translational diffusion of molecules.