In J. Mater Chem C 9 (2021) 10787, I analyzed the radical evaporation process and the radical thin film formation using thermodynamic concepts and described the material properties also using first-principles calculations (by Dr Arrigo Calzolari, CNR-NANO-S3, Modena). The presence of more than one radical site makes the radical more reactive, narrowing the windows left for evaporation, thus, favoring the assembly of molecules and island formation rather than two-dimensional growth.