Abstract
A two-dimensional solid-state NMR method is proposed for determining the mutual orientation of the two interaction tensors in each of which a different chemical group participates, from which information on the dihedral angle can be extracted. The two-dimensional powder pattern was observed for 1,2- 13C-labeled DL-alanine as a demonstration, correlating the 13C 1 chemical shift anisotropy and the 13C 2 1H dipolar coupling via polarization transfer. The OC 1C 2H dihedral angle as well as the orientation of the 13C 1 chemical shift tensor were determined from the spectrum.
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