In the discipline of chemical dynamics, researchers look at how quickly chemical reactions occur and how they work. As molecules collide in gaseous or condensed settings, it also involves the study of how energy is exchanged between molecules during these collisions. The chemical identity and energy content (i.e., electronic, vibrational, and rotational state populations) of the interacting species must thus be able to be tracked by the theoretical and experimental methods employed to study chemical dynamics. Furthermore, since the speeds of chemical reactions and energy transfer are of highest relevance, these tools must be able to perform on time scales where these processes, which are frequently very fast, occur. In order to simulate and comprehend the processes, let's look at some of the most popular theoretical models.