Contributors: Hyesu Jang Lee-Ping Wang
Goal: Design a QM benchmark set to find a level of theory that provides the best compromise between accuracy (in torsion barriers and optimized geometries) and computational cost.
Reference: A preliminary selection of molecules provided by L-P.
Selection Scheme:
Consideration of the coverage of chemical diversity
Variations in central bonds, formal charges, element compositions, intramolecular interactions;
Inclusion of molecules (1) w/ non-zero formal charges, (2) w/ strong internal interactions, (3) w/ central bond conjugated( < 10 kcal/mol rotational barrier) or (4) w/ halogen
Consistency in molecular size
Selected torsions:
Starts with torsions selected by L-P ( torsions in slide 16), Consider coverage of central bonds defined in the ff, and select one torsion per each central bond in a way to minimize the overlap of functional groups between molecules;
36 1-D torsions were selected from Roche and Coverage set.
