The Journal of Chemical Physics · 1957 · 19 citations · 5 references
Natural SciencesChemistryPhysicsPhysical ChemistrySpectroscopic AnalysisSpectroscopyCarbonyl ChemistryInfrared SpectroscopyMolecular SpectroscopyOptical SpectroscopyRotational SpectroscopyVibrational SpectroscopyFermi ResonanceInfrared Absorption SpectraInfrared Absorption SpectroscopyInfrared SpectraMolecular Rotational ConstantsRotational Fine StructureVibrational BandsVibrational Energy Levels
Fourteen bands of carbonyl sulfide have been observed between 1 and 5.5 μ. The rotational fine structure of the bands has been analyzed and the values of the molecular constants determined. From the average ΔF2 values of the 8 best bands, B0=0.20288±0.00002 cm—1 and D0=(4.08±0.52)×10—8 cm—1, in excellent agreement with the microwave determinations. Several constants in the quadratic expression for the vibrational energy are evaluated, but Fermi resonance between levels of the type (v1,v2l,v3) and (v1 — 1, v2l+2, v3) rule out a complete determination from the presently available bands. It is shown that the previously suggested Fermi resonance between v3 and 4v20 is so small that it is not detected in this work.
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