The lowest singlet, triplet, and quintuplet electronic states of SiC

A multireference configuration interaction (MRCI) approach, based on complete-active-space self-consistent-field (CASSCF) wave functions and correlation-consistent polarized-valence quintuple-zeta (cc-pV5Z) basis sets were employed to revise the lowest-lying singlet, triplet, and quintuplet electronic states of SiC, correlating with the two lowest-lying atomic dissociation channels. Besides describing the already known electronic states, excitation energies, equilibrium internuclear distances, dissociation energies, and spectroscopic constants for sixteen new electronic states will be reported.