Long-range 13C–1H coupling constants. Part II. Morpholine, N-methylmorpholine, and 1-methyl-4-piperidone
Abstract
Single resonance 13C Fourier transform n.m.r. spectra of the title compounds are described. It is shown that the pattern of fine splitting caused by long-range 13C–1H couplings together with the 1J values provides a means of differentiating 13C nuclei in the system NCH213CH2X, where X =CO, NH, NMe, or O.