The software package SIMPSON 4.2.1 was used to simulate polarization transfer dynamics between different components of two C spins representing C and C nuclei for DIPSI-3, hSPEPS CA-CB and C948 1 recoupling sequences. Homonuclear dipolar and scalar couplings were set to 2084.9 Hz and 35 Hz respectively. Isotropic chemical shifts for C and C nuclei were 52 ppm and 22 ppm, while radiofrequency (RF) irradiation was applied at 37 ppm. Numerical studies were performed for 55 kHz MAS rate and 600 MHz spectrometer. The RF field strength for DIPSI-3 was set to 10 kHz, while it was set according to the MAS rate for hSPEPS CA-CB (27.5 kHz average RF strength) and C948 1 (20.625 kHz RF strength). Selected sections of the SIMPSON input file, which represent relevant computational and interaction parameters are given in the supplementary information (supplementary text). The simulations explore polarization transfer efficiency between principal components of C and C spins, (i.e. X to X, Y to Y, Z to Z). Additionally, undesirable mixing between orthogonal magnetization components (i.e. X and Y, X and Z etc.), which, in principle, could give rise to phase distortions and/or artefacts in the spectra was systematically explored. Finally, we analysed the effects of RF inhomogeneity on the performance of the considered pulse sequences.