We performed single-point potential energy scans along the same CASSCF and CASPT2 reaction pathways that were reported in Ref. 25, using SF-TDDFT and LR-TDDFT. The results are compared with the energies calculated from multireference configuration interaction singles and doubles (MRCISD) with the Davidson correction (MRCISD+Q), taken from Ref. 25. The S 0 and S 1 potential surfaces along the CASSCF and CASPT2 pathways are depicted in Fig. .