Artículo
Vibrational dynamics of the FCH4(-) complex
Fecha de publicación:
06/2012
Editorial:
American Chemical Society
Revista:
Journal of Physical Chemistry A
ISSN:
1089-5639
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Motivated by recent photodetachment experiments studying resonance structures in the transition-state region of the F + CH4 → HF + CH3 reaction, the vibrational dynamics of the precursor complex CH4•F- is investigated. Delocalized vibrational eigenstates of CH4•F- are computed in full dimensionality employing the multiconfigurational time-dependent Hartree (MCTDH) approach and a recently developed iterative diagonalization approach for general multiwell systems. Different types of stereographic coordinates are used, and a corresponding general N-body kinetic energy operator is given. The calculated tunneling splittings of the ground and the lower vibrational excited states of the CH4•F- complex do not significantly exceed 1 cm-1. Comparing the converged MCTDH results for localized vibrational excitations with existing results obtained by normal-mode-based (truncated) vibrational configuration interaction calculations, significantly lower frequencies are found for excitations in the intermolecular modes.
Palabras clave:
MCTDH
,
Multidymensional quantum dynamics
,
Vibrational spectrum
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Wodraszka, Robert; Palma, Juliana Isabel; Manthe, Uwe; Vibrational dynamics of the FCH4(-) complex; American Chemical Society; Journal of Physical Chemistry A; 116; 46; 6-2012; 11249-11259
Compartir
Altmétricas