The far infrared spectrum of methyl mercaptan from 15 cm -1 to 45 cm -1
Abstract
The infrared absorption spectrum of methyl mercaptan is measured between 17 cm -1 and 44 cm -1. Theoretical analysis shows that the absorption spectrum in this range is associated with end-over-end rotation (parallel transitions) of the molecule as well as with internal rotation transitions (perpendicular transitions). Calculating both of these contributions to the absorptions, the infrared spectrum is identified. A value is deduced for the rotational constant and for the centrifugal stretching constant. Internal rotation energy levels and wave functions for methyl mercaptan are tabulated.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- August 1967
- DOI:
- 10.1016/0022-2852(67)90121-X
- Bibcode:
- 1967JMoSp..23..425P