https://compstatininhibitor.co....m/significant-robot-
We find that Möbius(-like) structures have much stronger static correlation character compared to the remaining frameworks, and therefore this leads to significant mistakes in DLPNO-CCSD(T) and even DLPNO-CCSD(T1) approaches, unless TightPNO cutoffs are employed. If sub-kcal mol-1 precision with respect to canonical relative energies is required even for Möbius-type methods (or any other systems plagued by strong static correlation), then Nagy and Kallay's LNO-CCSD(T) method with "tight" options could
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