ANALYSIS OF THE $\nu_{14}$ BAND OF BENZENE-$d_{6}$

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 Title: ANALYSIS OF THE $\nu_{14}$ BAND OF BENZENE-$d_{6}$ Creators: Pliva, J.; Valentin, A.; Chazelas, J.; Henry, L. Issue Date: 1986 Publisher: Ohio State University Abstract: The perpendicular band of the $E_{1u}$ vibration $\nu_{14}$ of benzene-$d_{6}$ was recorded in the $800 - 830 cm^{-1}$ region with the aid of a large Fourier transform spectrometer at the Universit\'e pierre et Marie Curie with resolution near the Doppler limit. $PP_{k}$ branches up to $K = 50$ and $^{r}R_{K}$ branches to $K = 39$ have been assigned in the $v_{14}$ band. The $^{r}R_{K}$ branches for K from 16 to 30 are strongly affected by an x,y-Coriolis resonance, with an avoided crossing observed between $K^{\prime} = 23$ and 24. The origin of the state responsible for this perturbation lies above $820 cm^{-1}$, close to the reported position of the infrared- and Raman-inactive $B_{2u}$ fundamental $\nu_{10}$. However, a direct first-order interaction between $B_{2u}$ and $E_{1u}$ states is not allowed by symmetry, and alternative interpretations of the observed perturbation, including possible reassignment of the inactive $\nu_{10}$ and $\nu_{19}$ vibrations, will be discussed. Spectroscopic constants obtained from the analysis will be reported. Description: Address of Pl\'iva: Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802. Address of Valentin, Chazelas, and Henry: Laboratoire de Spectronomie Moleculaire CNRS 060136, Universit\'{e} Pierre et Marie Curie, 4 Place Jussieu, 75230 Paris Cedex 05, France. Author Institution: URI: http://hdl.handle.net/1811/16920 Other Identifiers: 1986-ME-4