Fig. 2

Molecular structure differences between the LT and the HT polymorphs in ditBu-BTBT. a Order-to-disorder transition of the side chain and the three conformations determined from SCXRD. The carbon atoms in the asymmetric unit are labeled. b Change in herringbone dihedral angle between the LT and HT polymorphs. c Comparison of unit cells before and after the transition. The unit cell parameters with the most pronounced changes are labeled. Hydrogen atoms are omitted for clarity