Standard molecular orbital theory and single-reference methods struggle to accurately predict the properties of systems exhibiting strong electron correlation, necessitating multiconfigurational or specialized multi-reference approaches.
The claim states that Molecular Orbital Theory (and by extension standard single-reference methods) poorly predicts properties of systems with strong electron correlation. Multiple retrieved papers directly support this, noting that standard Kohn-Sham or single-reference approaches fail in strongly correlated regimes, requiring multiconfigurational or active space methods instead. There are no refuting papers.