Energy levels for U++ and electronic states for UO2++

Using the full relativistic quantum mechanics (GRASP2), all the 214 of electronic states of U++ with [Rn]5f26d17s1 have been calculated. The ground state (CSF) of U++ is 5K5. It was assumed that the UO2++ ion is linear (D∝h) and U++ and O2 all are on their ground State 5K5 and X3Σg-, respectively, then, based on group theory, we have derived the possible electronic states being 3,5,7Σg- + 3,5,7Πg, ... for UO2++. Presumably, the ground state of UO2++ will not be 1Σg+