Abstract
A number of coupling constants between 15N and other nuclei, e.g. X = 1H, 19F, 31P, can be obtained using CW spectroscopy and 15N enriched samples. However, with the availability of commercial FT spectrometers, the direct determination of nJ15N ~ X coupling constants from X-undecoupled 15N spectra, at the natural abundance level of the 15N isotope. No transformation of J 14N~X coupling constants into J 15N~X coupling constants has been attempted. Moreover we shall not discuss the theoretical analysis of coupling here since this aspect has been treated elsewhere (W 29), and, rather than successively examining the coupling constants in given series of compounds, whe shall present the results in terms of the more or less quantitative correlations which have been discussed.
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