Hydrogen-bonded molecular trimers: Vibration-tunneling states and low-frequency spectra from rigorous high-dimensional quantum calculations.
Noncovalently bound molecular trimers, held together by hydrogen-bonded and van der Waals interactions, are the smallest clusters in which the three-body interactions can manifest. Accurate description of these nonadditive interactions is of great importance since they play a crucial role in shaping the energetics, str...