FINE-STRUCTURES OF H-1-COUPLED C-13 MAS NMR-SPECTRA FOR UNIAXIALLY ROTATING MOLECULES IN DEUTERATED SURROUNDINGS - CONFORMATIONS OF N-ALKANE MOLECULES ENCLATHRATED IN UREA CHANNELS

It is theoretically shown that spectral fine structures due to the int ramolecular H-1-H-1 dipolar couplings and the C-13-H-1 J-couplings can be observed in uniaxially rotating molecules magnetically isolated fr om the surroundings when the C-13 spectrum is observed under magic-ang le spinning without H-1-decoupling. Such fine structures were observed for [2-C-13]decane molecules enclathrated in deuterated urea channels .