The high resolution infrared spectrum of the ν₄ band of 1,1,1- trifluoro - ethane

Gianfranco Di Lonardo (1) , Adriana Predoi-Cross (2) , Michel Herman (3) , Giandomenico Nivellini (1) , Luciano Fusina (1) , Amr Ibrahim (2)

1 Dipartimento di Chimica Fisica e Inorganica [Bologna]
2 Department of Physics and Astronomy [Lethbridge]
3 Service de Chimie Quantique et Photophysique

The ν₄ band of 1,1,1- trifluoroethane (CH₃CF₃) has been studied using synchrotron radiation at the far-infrared beamline, Canadian Light Source. The spectra were recorded at a resolution of 0.00096 cm^-1 in the spectral range 800 to 860 cm^-1 using a Bruker IFS125 FT spectrometer. Altogether 2785 lines were assigned to ^qP_K (J) and ^qR_K(J) transitions with J" up to 71 and K up to 45. The ^qQ_K (J) sub-branches are too congested and overlapped to other hot-band Q branches to be analyzed. A Watson-type Hamiltonian containing the usual terms up to the 6^th power in the angular momentum operators was used in the analysis. The spectroscopic parameters obtained from the fit reproduce 2636 transitions with a standard deviation of about 0.00016 cm^-1.

Mots clés: Physical Sciences

Gianfranco Di Lonardo, Adriana Predoi-Cross, Michel Herman, Giandomenico Nivellini, Luciano Fusina, et al.. The high resolution infrared spectrum of the ν₄ band of 1,1,1- trifluoro - ethane. Molecular Physics, 2010, pp.1. ⟨10.1080/00268971003720322⟩. ⟨hal-00595190⟩