The nitrogen-15 shifts of a series of enriched benzamides and benzonitriles have been measured utilizing the Fourier pulse method. A correlation of the nitrogen shifts with Hammett substituent constants has been observed. π-Density changes are shown to contribute to the observed changes in nitrogen-15 shifts within each series.
P. S. Pregosin, E. W. Randall and A. I. White, J. Chem. Soc., Perkin Trans. 2, 1972, 513 DOI: 10.1039/P29720000513
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