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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 4, Number 1
January 20, 1983 

Study of Molecular Reorientation in Liquid with Raman Spectroscopy (Ⅱ) Anisotropic Rotation of C6F6 in Neat Liquid
Wan In Lee, Kook Joe Shin, Myung Soo Kim
Anisotropic rotation of C6F6 in neat liquid is investigated by the analysis of the ν1 and ν15 (both C-F stretching) bands of Raman spectrum and diffusion constants for the spinning (D∥) and tumbling (D⊥) motions are obtained by the rotational dffusion theory. The same analysis is also carried out for the ν2 and ν16 (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 C6F6 is highly anisotropic and the anisotropy is greater for C6F6 than benzene. This is due to the fact that the spinning rate is about the same but the tumbling rate is sharply reduced for C6F6.
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