Fundamental Frequency Assignment of Thionyl Fluoride (SOF2)

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Abstract
The fundamental frequency assignment of thionyl fluoride has been made from Raman spectra of the liquid at −100°C and the gas at 2.5 atm and the infrared spectrum of the gas. The sample used has a purity of greater than 99.9 mole %. The fundamental frequency assignment with the following frequency values taken from the infrared spectrum is ν1(a′), 1329.9, 1339.3 cm−1 (Fermi resonance doublet); ν2(a′), 808.2 cm−1; ν3(a′), 530.4 cm−1; ν4(a′), 377.8 cm−1; ν5(a′), 747.0 cm−1; ν6(a″), 392.5 cm−1. The symmetric and asymmetric SF2 bending modes, ν4 and ν6, have been definitely identified in all the spectra and their symmetry characterized by polarization measurements from the Raman spectrum of the liquid.