Deuterium Quantification through Deuterium‐Induced Remote 1H and 13C NMR Shifts |
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Authors: | Prof?Dr Rudolf Knorr Dr David S Stephenson |
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Institution: | Department Chemie der Ludwig‐Maximilians‐Universit?t München, Butenandtstrasse 5–13 (Haus F), 81377 München (Germany) |
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Abstract: | Partial labeling by deuterium may be quantified through simple integrations of those 1H (200 or 400 MHz ) and 13C (100.6 MHz ) NMR resonances that are split into pairs by chemical shifts nΔ=δ(deuterated)?δ(nondeuterated) as induced by deuterium across n>2 chemical bonds. The relative intensities of the two components of a pair are shown to be influenced to practically equal degrees by relaxation effects, so that a deuterium fraction may be determined from 1H and 13C integral pairs at more remote molecular positions under the routine conditions of fast accumulative spectral acquisition. |
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Keywords: | 13C NMR integration analytical methods deuterium‐induced NMR shifts isotope effects NMR spectroscopy |
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