The Rotational Spectrum of Propane Centrifugal Distortion Analysis

Abstract

The ground state rotational spectrum of propane has been investigated between 6.4 and 26.5 GHz with a microwave Fourier transform spectrometer and between 140 and 300 GHz with a millimeter-wave spectrometer. High J transitions have been measured and fitted to a centrifugally distorted Hamiltonian including some sextic coefficients. The results of the analysis are sufficiently accurate for the prediction of all strong transitions of astrophysical interest.

The Ground State Microwave Spectrum of 2-Fluoropropane

“…As expected, the barrier due to internal rota tion V3 -3.285 kcal/mol is somewhat higher than V3 = 3.166 kcal/mol of propane [20]. The moments of inertia Ix = 3.184 amuÄ of the IAM analysis and 3.182 amuÄ2 resulting from the rs parameters of 2-fluoropropane are almost the same, whereas the joint analysis of diffraction data and moments of iner tia [7] leads to 7a = 3.45 amuÄ2, which is unusually large.…”

Contribution of Microwave Fourier Transform Spectroscopy to the Investigation of Nuclear Quadrupole Coupling

“…MWFT spectroscopy can produce spectra by long polarizing MW pulses. The molecules methane, CH 4 , [46,47], germane, GeH 4 , [48,49], propane, (CH 3 ) 2 CH 2 , [50], and borontrifluoride, n BF 3 , [51,52], may be mentiond here, as is demonstrated in Fig. 6 for n BF 3 .…”

Applications of Fourier transform microwave (FTMW) detected infrared–microwave double-resonance spectroscopy to problems in vibrational dynamics

“…2. These spectra are obtained using a laser scan rate of 3.6 cm À1 /h and averaging 100 measurements of the 1 01 -0 00 rotational transition at 8633.42 MHz [53]. There are two differences between the GSD and coherence measurements.…”