HIGH-RESOLUTION C-13 NMR INVESTIGATION OF A(6)C(60) (A=K, RB, CS) ANDBA3C60

We report the result of C-13 nuclear magnetic resonance (NMR) measurem ents on A(6)C(60) (A K, Rb, Cs) and Ba3C60. By using high-resolution m agic angle spinning, we were able to identify an isotropic line around 156 ppm for all investigated compounds. NMR spectra of the saturated alkali compounds are quite similar. The corresponding isotropic lines show three narrow components consistent with orientationally ordered C -60 molecules leading to three non-equivalent carbon sites in these co mpounds as reported by x-ray studies. No line splitting was observed f or the Ba3C60 isotropic line. Copyright (C) 1996 Elsevier Science Ltd