2016
DOI: 10.1021/acs.jctc.6b00304
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Assessment of Different Quantum Mechanical Methods for the Prediction of Structure and Cohesive Energy of Molecular Crystals

Abstract: A comparative assessment of the accuracy of different quantum mechanical methods for evaluating the structure and the cohesive energy of molecular crystals is presented. In particular, we evaluate the performance of the semiempirical HF-3c method in comparison with the B3LYP-D* and the Local MP2 (LMP2) methods by means of a fully periodic approach. Three benchmark sets have been investigated: X23, G60, and the new K7; for a total of 82 molecular crystals. The original HF-3c method performs well but shows a ten… Show more

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Cited by 96 publications
(155 citation statements)
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References 75 publications
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“…112 The C21 and X23 sets have been used in a certain number of studies for testing functionals. 22,95,108,[112][113][114][115][116][117][118][119][120][121][122][123][124][125][126] From our results, we can see that most dispersion-corrected functionals except vdW-DF lead to reasonably small errors for the equilibrium lattice constant a 0 . Compared to the other dispersion-corrected functionals, SCAN+rVV10 has a more pronounced tendency to underestimate a 0 (−3% for NH 3 and −2% CO 2 ), while SCAN (and TM) without NL-vdW correction was already pretty good and compete with the best dispersion-corrected functionals.…”
Section: Methodsmentioning
confidence: 93%
“…112 The C21 and X23 sets have been used in a certain number of studies for testing functionals. 22,95,108,[112][113][114][115][116][117][118][119][120][121][122][123][124][125][126] From our results, we can see that most dispersion-corrected functionals except vdW-DF lead to reasonably small errors for the equilibrium lattice constant a 0 . Compared to the other dispersion-corrected functionals, SCAN+rVV10 has a more pronounced tendency to underestimate a 0 (−3% for NH 3 and −2% CO 2 ), while SCAN (and TM) without NL-vdW correction was already pretty good and compete with the best dispersion-corrected functionals.…”
Section: Methodsmentioning
confidence: 93%
“…The D3 and gCP corrections as well as both HF-3c and PBEh-3c approaches, originally proposed for molecular calculations, have been extended to periodic systems and implemented in the CRYSTAL17 code (Brandenburg et al, 2013;Brandenburg & Grimme, 2013aCutini et al, 2016). The two composite methods are particularly targeted to model molecular crystals.…”
Section: Dispersion-corrected Functionals and Composite Methods Formentioning
confidence: 99%
“…When a finite pre-stress σ pre is applied in the form of a hydrostatic pressure P, within the frame of finite Eulerian strain, the elastic stiffness constants become ( B3LYP-D*/TZP 3.0 AE 1.9 (6.0) 4.6 AE 6.0 (17.9) Cutini et al (2016) SP-B3LYP-D* 5.2 AE 5.8 (15.6) Cutini et al (2016)…”
Section: Elastic Constants Under Pressurementioning
confidence: 99%
“…The noncovalent interaction of H 2 O and H 2 O 2 is determined by intermolecular H‐bonds of different strength . The B3LYP functional produces reasonable geometries, harmonic frequencies, and IR intensities of the molecular crystals with H‐bonds of different strength and does not require the use of different empirical corrections . The slab parameters are fixed, and structural relaxations are limited to the positional parameters of atoms.…”
Section: Methodsmentioning
confidence: 99%