Abstract
The high-resolution vibration–rotation spectrum of the ν2 fundamental band of gas-phase thionyl fluoride, SOF2, has been observed centred at 808 cm−1. Spectra were recorded in absorption using a Fourier-transform spectrometer with the sample of SOF2 held in a gas cell at a temperature of 294 K. In total, 1929 a- and c-type vibration–rotation transitions of the most abundant isotopomer, 32S16OF2, have been assigned and included in a least-squares fit. The least-squares analysis, performed using a standard semi-rigid rotor Hamiltonian, has yielded precise spectroscopic parameters for the v2=1 level. The analysis confirms the assignment of the band to excitation of the symmetric S–F stretching vibration. Additional, partially resolved features are attributed to the Q-branches of the ν2 fundamental band of 34S16OF2 and of ν2 difference bands from low-lying excited vibrational levels.
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