Klaus Muller-DethlefsALI HAMZAH MOHAMMED ALESSA2022-05-282022-05-28https://drepo.sdl.edu.sa/handle/20.500.14154/39319Non-covalent interactions play an important role in the stabilisation and structure of various organic and biological molecules and are therefore of importance in astrochemistry, biochemistry, and material science. The work in this thesis focuses on pi-pi and/or CH-pi interactions, i.e. the interaction of aromatic ringsen