Table 1. Excitation Energies of the Dianionic Chromophore (2Chro2– → 2Chro2–∗) Computed with Different Methods.
| method | basis | ΔE, eV |
|---|---|---|
| SOS-CIS(D)a | 6-31G(d,p) | 1.68 |
| TDDFT(B5050LYP) | 6-31G(d,p) | 1.71 |
| TDDFT(B5050LYP) | aug-cc-pVTZ | 1.65 |
| TDDFT(ωB97X-D) | 6-31G(d,p) | 1.65 |
UHF reference converged to the solution close to the ROHF one using maximum overlap method;59⟨ S2⟩ = 1.2.