FAR INFRARED TORSIONAL AND BENDING VIBRATIONS OF BENZALDEHYDES, PYRIDINE CARBOXALDEHYDES, ACETOPHENONE, STYRENE AND THEIR HALOGEN DERIVATIVES THE CALCULATION OF BARRIERnHEIGHT TO INTERNAL ROTATION

摘要

The far infrared spectra of benzaldehyde, pyridine carbox-aldehydes, acetophenone, styrene, nitrobenzene, and some of the halogen derivatives has 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 differ-ences in the calculated barrier height.