Multiconfigurational Study of the Electronic Structure of Negatively Charged Fullerens
Multiconfigurational second order perturbation theory was employed in order to describe the ground and excited states of C_60^(-n). Different choices of the active spaces are discussed and the possibility to apply multiconfigurational theory to study C_120 is investigated. The calculations were performed for all possible spin states (for selected charge) and show the preference of low spin state.