Assignment of carbon‐13 NMR spectra and sign determination of long range carbon‐13—proton coupling constants with SPI

Abstract

AbstractThe application of selective population inversion (SPI) to the assignment of 13C resonances and to the determination of the relative sign of 13C1H coupling constants is demonstrated for 1‐phenyl‐1,2‐dibromo‐2‐nitroethane. A negative sign for the geminal C‐2H‐1 coupling constant has been determined from the 13C spectra. The relationship between SPI and TSI is discussed.