Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

Ab initio calculations with various large basis sets have been performed on the water dimer in order to study the structure, energetics, spectra, and electrical properties. As a reference system, the calculations of the water monomer were also performed. The second order Mo/ller-Plesset perturbation theory (MP2) using a large basis set (O:13s,8p,4d,2f/H:8s,4p,2d) well reproduces various water monomer experimental data except for the somewhat underestimated absolute energy and hyperpolarizability. The monomer energy calculated with the fourth-order Mo/ller–Plesset perturbation theory (MP4) with the above basis set is −76.407 hartrees, which is only 0.073 hartree above the experimental energy. To compare the theoretical and experimental dimer structures and thermal energies accurately, we summarized the quantum statistical thermodynamic quantities with corrections for anharmonic vibration, rotation, rotation–vibration coupling, and internal rotation. With the correction for the anharmonic binding potential and rotation, the predicted interoxygen distance of the dimer is 2.958 Å, which is so far the closest to the experimental value ∼2.976 Å. The predicted dimer dipole moment is 2.612 D, which is the first agreement with experiment (2.60–2.64 D). The predicted frequency shift of the dimer with respect to the monomer is in good agreement with experiment. With the MP2 calculation using the large basis set, the basis set superposition error correction (BSSEC) of the dimer is only 0.33 kcal/mol, which is by far the smallest among the MP2 results reported. Without BSSEC, the predicted binding energy, enthalpy, free energy, and entropy are all in good agreement with experiment within the error bounds, whereas with BSSEC, some of them seem to be slightly off the experimental error bounds. Nevertheless, the results with BSSEC can be more reliable than those without BSSEC.  

Bibliography

Kim, K. S., Mhin, B. J., Choi, U.-S., & Lee, K. (1992). Ab initio studies of the water dimer using large basis sets: The structure and thermodynamic energies. The Journal of Chemical Physics, 97(9), 6649–6662.

Authors 4
  1. Kwang S. Kim (first)
  2. Byung Jin Mhin (additional)
  3. U-Sung Choi (additional)
  4. Kuntack Lee (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 8:22 a.m.)
Deposited 1 year, 6 months ago (Feb. 7, 2024, 11:13 a.m.)
Indexed 3 months ago (May 22, 2025, 5:29 a.m.)
Issued 32 years, 9 months ago (Nov. 1, 1992)
Published 32 years, 9 months ago (Nov. 1, 1992)
Published Print 32 years, 9 months ago (Nov. 1, 1992)
Funders 0

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@article{Kim_1992, title={Ab initio studies of the water dimer using large basis sets: The structure and thermodynamic energies}, volume={97}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.463669}, DOI={10.1063/1.463669}, number={9}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kim, Kwang S. and Mhin, Byung Jin and Choi, U-Sung and Lee, Kuntack}, year={1992}, month=nov, pages={6649–6662} }