VIBRATIONAL SPECTRA OF TRIFLUOROACETYL CHLORIDE AND RELATED MOLECULES
Loading...
Date
1964
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The Raman spectrum of liquid $CF_{3}COCl$ and the infrared spectra of the gas and the condensed solid have been studied, and fundamental frequencies assigned. For assumed $C_{a}$ symmetry, the a' fundamentals occur at 1811, 1284, 1240, 937, 750, 703, 583, 511, 334, and $198 cm^{-1}$, and a'' fundamentals at 1202, 517, 390 and $234 cm^{-1}$. The torsional vibration was not observed, although observations were made down to $30 cm^{-1}$. Unless the band is so weak as to have escaped detection, this means that the barrier in this molecule is $\leq300 cm^{-1}$. Of particular interest is the splitting of the $CF_{3}$ vibrations due to the plane of the molecule. The three C-F stretches were clearly resolved, the most symmetric being the highest in frequency and the stretch antisymmetric to the plane, the lowest. The two asymmetric $CF_{3}$ deformations (degenerate in $C_{3v}$ molecules) are almost $200 cm^{-1}$ apart. The spectra of related molecules, such as $(CF_{3})_{2}C=O, CF_{3}CHO$, and $CF_{3}CONH_{2}$, will also be discussed.
Description
Author Institution: Mellon Institute