Figure 2.
Interaction energies between methylguanidinium (MGUAN) and acetate (ACET) in a) to c) and between guanidinium (GUAN) and acetate (ACET) in d) to f) using the QM (blue), Drude-2013 (red) and optimized Drude-2019 (black) model chemistries. Hydrogens (H) are white, carbons (C) are green, nitrogens (N) are blue, and oxygens (O) are red. Distances, d(x…y) Å, are measured between the interacting atom x and y, where x are H, N or C, and y is O.