INFRARED AND RAMAN SPECTRA OF CRYSTALLINE $CF_{4}$ AND $SiF_{4}$.
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Date
1967
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Publisher
Ohio State University
Abstract
We have obtained the infrared and Raman spectra of $CF_{4}$ in its two crystalline phases. No splitting of the bands is observed in the high-temperature phase whereas all the fundamentals, except the symmetric stretch, yield doublets in the low-temperature modification. This is consistent with either $D_{2d}$ or $S_{4}$ site symmetry in the latter, and indicates that the structure is different from that of Phase II of $CH_{4}$. Results on $SiF_{4}$ infer that the structure is probably similar to that of Phase II of $CF_{4}$. This is at variance with the structure obtained from X-ray diffraction studies.
Description
Author Institution: D\'{e}partment de Chimie, Universit\'{e} Laval; D\'{e}partment de Chimie, Universit\'{e} de Sherbrooke