The v(5) band of (CH3CH3)-C-12-C-13: High resolution stimulated Raman spectrum and global three band analysis

作者：Moazzen Ahmadi N^*; Martinez R Z; Bermejo D

来源：Journal of Molecular Spectroscopy, 2011, 269(2): 151-155.

DOI：10.1016/j.jms.2011.06.003

• Internal rotation
• Ethane
• Raman spectrum
• Fermi interaction

Rotationally resolved spectrum of (CH3CH3)-C-12-C-13 in the region of v(5) vibrational fundamental (C-C stretch) was observed using stimulated Raman spectroscopy. This spectrum was analyzed with data from the v(12) fundamental and transitions from the v(6), 2v(6)-v(6), and 3v(6) torsional bands using a 3-state fit. One torsional component of the v(5) fundamental is perturbed, interacting with its partner in the v(6) = 4 of the torsional stack of the ground vibrational state. As for normal ethane, the coupling was successfully modeled using a Fermi-type interaction. The results mirror that of (CH3CH3)-C-12-C-12 in that the inclusion of the Fermi-type interaction reduces the required number of terms in the Fourier expansion of the torsional potential for the ground vibrational state from three (in the 2-state fit) to one, only the term in the barrier height is required.

• 出版日期2011-10