Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Study of Molecular Reorientation in Liquid with Raman Spectroscopy (Ⅱ) Anisotropic Rotation of$C_6F_6$ in Neat Liquid

  • Wan-In Lee (Department of Chemistry, Seoul National University) ;
  • Kook-Joe Shin (Department of Chemistry, Seoul National University) ;
  • Myung-Soo Kim (Department of Chemistry, Seoul National University)
  • Published : 1983.02.20
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Abstract

Anisotropic rotation of C$_{6}$F$_{6}$ in neat liquid is investigated by the analysis of the ν$_{1}$ and ν$_{15}$ (both C-F stretching) bands of Raman spectrum and diffusion constants for the spinning (D$_{II}$) and tumbling (D$_{⊥}$) motions are obtained by the rotational dffusion theory. The same analysis is also carried out for the ν$_{2}$ and ν$_{16}$ (both C-C stretching) bands and both results are compared with the results obtained for benzene in neat liquid. The results show that the reorientation of C$_{6}$F$_{6}$ is highly anisotropic and the anisotropy is greater for C$_{6}$F$_{6}$ than benzene. This is due to the fact that the spinning rate is about the same but the tumbling rate is sharply reduced for C$_{6}$F$_{6}$.

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