Exact six-dimensional quantum calculations of the rovibrational levels of (HCl)[sub 2].

Presents results of comprehensive full-dimensional (6D) quantum calculations of the rovibrational levels of hydrogen halide dimers for total angular momentum. Use of 6D potential energy surfaces in the calculations; Importance of including the intramolecular vibrations of two hydrochloric acid subunits in the comparison with four-dimensional bound state calculations.