Hi All,

I want to run dynamic simulation for ionic liquids. 5 ion pairs (imidazolium-bistriflimide) were added to an amorphous cell and COMPASS III was used as the forcefield. However, after geometry optimization and dynamic simulations, the obtained total energy is always negative, as shown in the snapshots attached. I would like to know proper settings for ionic liquid system, and if negative energies make sense. I really appreciate if someone could share experience with me.