Errors in chemical shift tensor components and orientation in the molecular frame as obtained from MAS NMR spinning sideband analysis.
It is shown how to calculate random errors in chemical shift tensor components and in the Euler angles which fix the orientation of the sigma tensor in the molecular frame, as obtained from spinning sideband analysis of MAS NMR spectra of powdered solids, when heteronuclear dipolar coupling interactions occur in a two spin system. The procedure was applied to experimental data corresponding to the chemical shift tensor of a carbon-13 bonded to a phosphorus-31 nucleus. Clues are given concerning the experimental variables to be set in order to obtain the desired accuracy in the orientation angles.
Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina. aolivier@fbioyf.unr.edu.ar
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Olivieri
D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D011208:Powders
D011208:Powders