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Chemical Sciences: A Manual for CSIR-UGC National Eligibility Test for Lectureship and JRF/Residual chemical shift anisotropy
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Residual chemical shift anisotropy (RCSA) is the difference between the chemical shift anisotropy (CSA) of aligned and non-aligned molecules. It is normally three orders of magnitude smaller than static CSA. RCSA is useful for structural determination and it is among the new developments in NMR spectroscopy.