With transformed coordinates for all dimers in hand, those with homologous monomers and similar rotations (within 15 • ), inclinations (within 5 • ), and displacements (within 0.5 Å) were considered to be homologous dimer conformations. For Phen and BzQuin, six homologous arrangements were found. Six of the nine conformations of the Phen dimer, and seventeen of the twenty-two conformations of the BzQuin dimer had homologues, while the remaining conformers were more unique. For the other five homologous monomers -DBT, DBTO, DBF, Fluor, and MeCarb -the overlap in their ensembles was substantially less, such that no arrangements were found with homologous representatives from all five dimers.