INFRARED AND RAMAN VIBRATIONAL STUDY OF ETHYLBENZENE, N-PROPYLBENZENE AND TERMINAL HALOGEN-SUBSTITUTED ANALOGS, 800-50/CM.
Summary technical rept. Oct 66-Aug 67,
DAYTON UNIV OHIO
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The infrared and Raman spectra of C6H5-CH2n-X, where X H, Cl, Br, I when n 2 and X H, Cl, Br when n 3, were studied in the liquid state from 800-50cm. An attempt was made to assign the vibrations of the monosubstituted benzene ring, the far infrared deformational vibrations, and the structure-dependent halogen stretching vibrations. In the 2-haloethyl-benzenes, two bands are assigned to the carbon-halogen vibrations, one for each isomeric form and it is concluded that the trans conformer is more stable than the gauche. In the 3-halo-propyl-benzenes, three bands are assigned to the carbon-halogen vibrations. The identity of these conformations is discussed using the nomenclature of Shimanouchi and Mizushima. Low temperature spectra were obtained in the 800-400cm region in the infrared and depolarization ratios were measured in the Raman bands. It was found necessary to revise the previous vibrational assignments of ethylbenzene and propose an assignment for n-propylbenzene in the region below 800cm. Author
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy