Raman and infrared spectra of dimethyl ether 13C-isotopologue (CH3O13CH3) from a CCSD(T) potential energy surface

Carvajal Zaera, Miguel; Álvarez Bajo, Osiris; Senent Díez, María Luisa; Dominguez Gomez, Rosa y Villa, M. (2012). Raman and infrared spectra of dimethyl ether 13C-isotopologue (CH3O13CH3) from a CCSD(T) potential energy surface. "Journal of Molecular Spectroscopy", v. 279 ; pp. 3-11. ISSN 0022-2852. https://doi.org/10.1016/j.jms.2012.07.018.

Descripción

Título: Raman and infrared spectra of dimethyl ether 13C-isotopologue (CH3O13CH3) from a CCSD(T) potential energy surface
Autor/es:
  • Carvajal Zaera, Miguel
  • Álvarez Bajo, Osiris
  • Senent Díez, María Luisa
  • Dominguez Gomez, Rosa
  • Villa, M.
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Molecular Spectroscopy
Fecha: Septiembre 2012
Volumen: 279
Materias:
Palabras Clave Informales: CH3OCH3, Dimethyl ether, Isotopologues, Ab initio, Infrared, Raman
Escuela: E.U.I.T. Obras Públicas (UPM) [antigua denominación]
Departamento: Ingeniería Civil: Hidráulica y Energética [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

So far, no experimental data of the infrared and Raman spectra of 13C isotopologue of dimethyl ether are available. With the aim of providing some clues of its low-lying vibrational bands and with the hope of contributing in a next spectral analysis, a number of vibrational transition frequencies below 300 cm−1 of the infrared spectrum and around 400 cm−1 of the Raman spectrum have been predicted and their assignments were proposed. Calculations were carried out through an ab initio three dimensional potential energy surface based on a previously reported one for the most abundant dimethyl ether isotopologue (M. Villa et al., J. Phys. Chem. A 115 (2011) 13573). The potential function was vibrationally corrected and computed with a highly correlated CCSD(T) method involving the COC bending angle and the two large amplitude CH3 internal rotation degrees of freedom. Also, the Hamiltonian parameters could represent a support for the spectral characterization of this species. Although the computed vibrational term values are expected to be very accurate, an empirical adjustment of the Hamiltonian has been performed with the purpose of anticipating some workable corrections to any possible divergence of the vibrational frequencies. Also, the symmetry breaking derived from the isotopic substitution of 13C in the dimethyl ether was taken into account when the symmetrization procedure was applied.

Más información

ID de Registro: 15799
Identificador DC: http://oa.upm.es/15799/
Identificador OAI: oai:oa.upm.es:15799
Identificador DOI: 10.1016/j.jms.2012.07.018
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0022285212001476
Depositado por: Memoria Investigacion
Depositado el: 30 Oct 2013 18:31
Ultima Modificación: 02 Oct 2014 22:56
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