From: The structural properties of dichlorodiazadienes synthesized based on 4-methylbenzaldehyde

Figure 14. View of the three-dimensional Hirshfeld surface of the compound (4). plotted over electrostatic potential energy using the STO-3 G basis set at the Hartree–Fock level of theory. Hydrogen-bond donors and acceptors are shown as blue and red regions around the atoms corresponding to positive and negative potentials, respectively