The Millimeter- and Submillimeter-Wave Spectrum of Methyl Mercaptan (CH3SH)

摘要: Methyl mercaptan (CH3SH), a threefold internal rotor and the sulfur analog of methanol, has been detected in interstellar medium, although little is known about its chemistry or physical conditions most favorable for synthesis. Until present, assigned fitted rotational-torsional spectral lines methyl have mainly confined to transitions involving low rotational quantum numbers. We measured many new spectrum this species through number J=20 using two spectrometers: our standard klystron-based system fast scan submillimeter spectroscopic technique (FASSST). The newly combined with previous data at lower frequencies form set consisting approximately 1000 that nearly accuracy experiments axis method we previously applied methanol. constants obtained from fit allowed us predict additional up 600 GHz frequency J=25 number.