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• W2051237863 abstract "Full-dimensional multiconfiguration time-dependent Hartree (MCTDH) computations are reported for the vibrational states of the documentclass[12pt]{minimal}begin{document}${rm H}_5^+$end{document}H5+ and its H4D+, H3documentclass[12pt]{minimal}begin{document}${rm D}_2^+$end{document}D2+, H2documentclass[12pt]{minimal}begin{document}${rm D}_3^+$end{document}D3+, documentclass[12pt]{minimal}begin{document}${rm HD}_4^+$end{document} HD 4+, documentclass[12pt]{minimal}begin{document}${rm D}_5^+$end{document}D5+ isotopologues employing two recent analytical potential energy surfaces of Xie et al. [J. Chem. Phys. 122, 224307 (2005)10.1063/1.1927529] and Aguado et al. [J. Chem. Phys. 133, 024306 (2010)10.1063/1.3454658]. The potential energy operators are constructed using the n-mode representation adapted to a four-combined mode cluster expansion, including up to seven-dimensional grids, chosen adequately to take advantage in representing the MCTDH wavefunction. An error analysis is performed to quantify the convergence of the potential expansion to reproduce the reference surfaces at the energies of interest. An extensive analysis of the vibrational ground state properties of these isotopes and comparison with the reference diffusion Monte Carlo results by Acioli et al. [J. Chem. Phys. 128, 104318 (2008)10.1063/1.2838847] are presented. It is found that these systems are highly delocalized, interconverting between equivalent minima through rotation and internal proton transfer motions even at their vibrational ground state. Isotopic substitution affects the zero-point energy and structure, showing preference in the arrangements of the H and D within the mixed clusters, and the most stable conformers of each isotopomer are the ones with the H in the central position. Vibrational excited states are also computed and by comparing the energies and structures predicted from the two surfaces, the effect of the potential topology on them is discussed." @default.
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• W2051237863 date "2012-12-05" @default.
• W2051237863 modified "2023-10-16" @default.
• W2051237863 title "Vibrational dynamics of the H5+ and its isotopologues from multiconfiguration time-dependent Hartree calculations" @default.
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• W2051237863 doi "https://doi.org/10.1063/1.4769081" @default.
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