Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 2, Issue 12, Pages 1377-1381Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz200369c
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- DFG [MA 1547/4]
- FCI
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Understanding the quantum dynamics of molecules undergoing large-amplitude vibrational motion is challenging because of their flat and anharmonic energy landscapes. Using quasiclassical ab initio path integral dynamics, time scales of large-amplitude motion, lifetimes, and IR spectra are computed for protonated methane, CH5+, and its deuterated species, CH4D+, CH3D2+, CH2D3+, CHD4+, and CD5+. The time scales of quantum pseudorotations are shown to depend sensitively on the particular isotopic substitution pattern, which characterizes the measured infrared spectra.
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