One of the most important contributions to the intermolecular molecular interaction energy originates from the mutual correlation of the electron movements between molecules. This effect is known as the dispersion interaction, and Fritz London recognized it as early as 1930. The dispersion energy is crucial in non-covalent systems, as it constitutes the major stabilizing effect. Such interaction is vital in many areas of chemistry and the physics of materials. In the simplest systems, like interactions of pairs of neutral atoms this interaction is responsible for the attraction of atoms at long range. In more complex systems, the dispersion forces are of key importance in protein folding, 5 or in the stacking of aromatic rings due to the strong attraction of coupled π-orbitals. Importantly, it allows for keeping the nucleic base pairs stacked. The dispersion energy can be conveniently calculated in terms of the second-order of the symmetry-adapted perturbation theory (SAPT): a general theory of calculating the intermolecular forces based on the following partitioning of the system Hamiltonian: