Accurate and Efficient Model Energies for Exploring Intermolecular Interactions in Molecular Crystals

作者：Turner, Michael J.; Grabowsky, Simon; Jayatilaka, Dylan; Spackman, Mark A.^*

来源：Journal of Physical Chemistry Letters, 2014, 5(24): 4249-4255.

DOI：10.1021/jz502271c

• DIRECT NUMERICAL-INTEGRATION
• SUPRAMOLECULAR ARCHITECTURE
• NONCOVALENT INTERACTIONS
• ELECTRON-DENSITIES
• DISPERSION
• BENCHMARKING
• DATABASE
• SYNTHONS
• CCSD(T)
• ACID

The energy of interaction between molecules is commonly expressed in terms of four key components: electrostatic, polarization, dispersion, and exchange-repulsion. Using monomer wave functions to obtain accurate estimates of electrostatic, polarization, and repulsion energies along with Grimme's dispersion corrections, a series of energy models are derived by fitting to dispersion-corrected DFT energies for a large number of molecular pairs extracted from organic and inorganic molecular crystals. The best performing model reproduces B3LYP-D2/6-31G(d,p) counterpoise-corrected energies with a mean absolute deviation (MAD) of just over I kJ Maori but in considerably less computation time. It also performs surprisingly well against benchmark CCSD(T)/CBS energies, with a MAD of 2.5 kJ mol(-1) for a combined data set including Hobza's X40, S22, A24, and S66 dirners. Two of these energy models, the widespread application in investigations of molecular crystals. most accurate and the fastest, are expected to find widespread application in investigations of molecular crystals.

• 出版日期2014-12-18