CI on DFT molecular orbitals gives multi-reference-CI-level excitation energies for molecules with strong dynamic but weak static correlation, but fails for strongly multireference core states as in N2.
Progress and Challenges in the Calculation of Electronic Excited States
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Configuration-interaction calculations with density-functional theory molecular orbitals for modeling valence- and core-excited states in molecules
CI on DFT molecular orbitals gives multi-reference-CI-level excitation energies for molecules with strong dynamic but weak static correlation, but fails for strongly multireference core states as in N2.