For the remaining five homologous monomers, comparison of homologous dimers is less straightforward, but still insightful. The homologous dimers, along with their binding energies, free energies of dimerization, dipole moments, dipole cancellation, SASA, and dispersion contributions, are listed in Table . There is greater geometric variation between the monomers, and there are differences in the number of electrons, leading to greater differences kJ/mol. These monomers exhibit substantially more variation than do Phen and BzQuin, and no two monomers are isoelectronic. However, the ring system is largely unchanged, allowing for some comparisons to be made. Unlike the Phen and BzQuin dimers, there is little correlation between E b and dipole cancellation when all the dimers are considered, as R 2 is only 0.0965. However, six of the DBTO dimers have significant departures from co-planarity induced by the geometry of the S=O side chains, which begin to disrupt the π -π stacking.