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2016 ; 12
(3
): 1097-120
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Semiempirical Quantum-Chemical Orthogonalization-Corrected Methods: Benchmarks
for Ground-State Properties
#MMPMID26771261
Dral PO
; Wu X
; Spörkel L
; Koslowski A
; Thiel W
J Chem Theory Comput
2016[Mar]; 12
(3
): 1097-120
PMID26771261
show ga
The semiempirical orthogonalization-corrected OMx methods (OM1, OM2, and OM3) go
beyond the standard MNDO model by including additional interactions in the
electronic structure calculation. When augmented with empirical dispersion
corrections, the resulting OMx-Dn approaches offer a fast and robust treatment of
noncovalent interactions. Here we evaluate the performance of the OMx and OMx-Dn
methods for a variety of ground-state properties using a large and diverse
collection of benchmark sets from the literature, with a total of 13035 original
and derived reference data. Extensive comparisons are made with the results from
established semiempirical methods (MNDO, AM1, PM3, PM6, and PM7) that also use
the NDDO (neglect of diatomic differential overlap) integral approximation.
Statistical evaluations show that the OMx and OMx-Dn methods outperform the other
methods for most of the benchmark sets.