Pulse Sequences to Observe NMR Coupled Relaxation in AXn Spin Systems

NMR pulse sequences that are modifications of the HSQC experiment are proposed to observe ${}^{13}\text{C}$-coupled relaxation in AX, AX${}_2$, and AX${}_3$ spin systems. ${}^{13}\text{CH}$ and ${}^{13}{\text{CH}}_2$ moieties are discussed as exemplary AX and AX${}_2$ spin systems. The pulse sequences may be used to produce 1D or 2D proton NMR spectra.