C-13 CHEMICAL SHIELDING ANISOTROPY IN THE SOLID-PHASES OF (CH3CN)-C-13

The principal elements of the axially symmetric nitrile C-13 chemical shift tensor, acid the C=N bond distance of solid CH3CN have been dete rmined from both static and sample spinning NMR experiments at 78 and 140 K. The spectra show no significant differences between the alpha a nd beta forms of the solid though a large temperature coefficient is o bserved for both the isotropic chemical shift, <(sigma)over bar>, and the N-14 nuclear electric quadrupole interactions as seen through the carbon-nitrogen dipole interaction.