Three-dimensional model calculation of torsional levels of (H2O)3 and (D2O)3

Dubravko Sabo, Zlatko Bačić, Thomas Bürgi, Samuel Leutwyler

Research output: Contribution to journalArticlepeer-review


A coupled three-dimensional model calculation of the low-frequency large-amplitude intermolecular torsional states in (H2O)3 and (D2O)3 is presented, based on the analytical modEPEN intermolecular potential surface and a three-dimensional discrete variable representation approach. The lowest torsional levels of both (H2O)3 and (D2O)3 lie above the sixfold (upd) torsional barrier. The first eight (eleven) torsions of (H2O)3 ((D2O)3) are pseudorotational states. The 'radial' and 'polar' torsional fundamental frequencies are predicted at 151 and 160 cm-1 for (D2O)3, and for (H2O)3 at 185.0 and 185.3 cm-1, respectively. Each of these in turn support a ladder of pseudorotational levels.

Original languageEnglish (US)
Pages (from-to)283-294
Number of pages12
JournalChemical Physics Letters
Issue number3-4
StatePublished - Oct 6 1995

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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