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

We investigated five lowest energy structures of the water hexamer (ring, book, bag, cage, and prism) using extensive ab initio calculations. High levels of theory using various basis sets were employed. On the basis of Mo/ller–Plesset second order perturbation (MP2) calculations using a large basis set [9s6p4d2 f1g/6s4p2d]+diffuse(2sp/s), the lowest energy structure with zero point energy (ZPE) correction is the cage conformer, followed by the book (within 0.1 kcal/mol) and the prism (within 0.2 kcal/mol). The spectra of the five conformers have been investigated. The predicted rotational constants and dipole moments of the cage conformer are in good agreement with the experiment [Liu et al., Nature 381, 501 (1996)] as compared to other structures. This proves that the experiment surely found the cage structure, which was first reported by one of the authors [Kim et al., Chem. Phys. Lett. 131, 451 (1986)]. However, the five structures would still be nearly isoenergetic within 0.7 kcal/mol at 0 K. Above ∼40 K, the free energy of the book is slightly lower than the cage, which might imply that the book structure would be detected. Upon deuteration, the cage structure is the lowest energy conformer, followed by two competing structures of the book and prism whose energies are only 0.2 kcal/mol higher at 0 K; above ∼55 K the book would be more populated than the cage.

Bibliography

Kim, J., & Kim, K. S. (1998). Structures, binding energies, and spectra of isoenergetic water hexamer clusters: Extensive ab initio studies. The Journal of Chemical Physics, 109(14), 5886–5895.

Authors 2
  1. Jongseob Kim (first)
  2. Kwang S. Kim (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 8:16 a.m.)
Deposited 1 year, 6 months ago (Feb. 7, 2024, 3:22 a.m.)
Indexed 3 weeks, 6 days ago (July 30, 2025, 11:28 a.m.)
Issued 26 years, 10 months ago (Oct. 8, 1998)
Published 26 years, 10 months ago (Oct. 8, 1998)
Published Print 26 years, 10 months ago (Oct. 8, 1998)
Funders 0

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@article{Kim_1998, title={Structures, binding energies, and spectra of isoenergetic water hexamer clusters: Extensive ab initio studies}, volume={109}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.477211}, DOI={10.1063/1.477211}, number={14}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kim, Jongseob and Kim, Kwang S.}, year={1998}, month=oct, pages={5886–5895} }