Accession Number : AD0622521

Title :   FAR INFRARED TORSIONAL AND BENDING VIBRATIONS OF BENZALDEHYDES, PYRIDINE CARBOXALDEHYDES, ACETOPHENONE, STYRENE AND THEIR HALOGEN DERIVATIVES. THE CALCULATION OF BARRIER HEIGHT TO INTERNAL ROTATION.

Descriptive Note : Technical documentary rept. for Jun 64-Jun 65,

Corporate Author : MELLON INST PITTSBURGH PA

Personal Author(s) : Fateley,William G. ; Miller,Foil A. ; Witkowski,Robert E.

Report Date : AUG 1965

Pagination or Media Count : 68

Abstract : The far infrared spectra of benzaldehyde, pyridine carboxaldehydes, acetophenone, styrene, nitrobenzene, and some of the halogen derivatives have been investigated. Torsional vibrations have been assigned and barriers to internal rotation have been calculated for the C-C single bond. Results are given on the shift in frequency resulting from changes from liquid to vapor phase as well as reporting the differences in the calculated barrier height. Experimental evaluation of the interferometer's performance is reported. The computed program for taking the Fourier transpose of the interferogram is given. The transmission of many available commercial crystals and polyethylenes are also reported. (Author)

Descriptors :   (*AROMATIC COMPOUNDS, INFRARED SPECTRA), (*INFRARED SPECTROSCOPY, AROMATIC COMPOUNDS), ALDEHYDES, PYRIDINES, HALOGEN COMPOUNDS, CHEMICAL BONDS, VIBRATION, COMPUTER PROGRAMMING, INTERFEROMETERS, WATER, POLYETHYLENE PLASTICS, CRYSTALS, QUARTZ, SILICON

Distribution Statement : APPROVED FOR PUBLIC RELEASE