Rotational analysis of the ν1 band of trichlorofluoromethane from high resolution Fourier transform and diode laser spectra of supersonic jets and isotopically enriched samples

Abstract

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Diode–Laser Jet Spectra and Analysis of the ν1 and ν4 Fundamentals of CCl3F

“…The intensity distribution of the many overlapping transitions with high J and K quantum numbers in the Q branches allow for a more accurate determination of the rotational temperature than from P and R transitions only. Combining our data with the diode-laser jet data of (1) Ϫ3 cm Ϫ1 is satisfactory and the molecular constants are in good agreement with (1). The assignment of the lines due to the C 35 Cl 37 Cl 2 F isotopomer was rather troublesome, considering the strong overlap by the two more abundant species.…”

“…Here we present high-resolution diode-laser slit-jet spectra of both 1 and 4 fundamentals. The 1 spectra are more complete than those published before (1), and are in good agreement with (1), except for a different band origin for the C 35 Cl 37 Cl 2 F isotopomer. The analysis of 4 is the first line-by-line analysis reported for this fundamental to our knowledge.…”

Molecular chirality and the fundamental symmetries of physics: Influence of parity violation on rovibrational frequencies and thermodynamic properties

“…63 One may cite in this context the case of the similarly late achievement of the full rovibrational analysis of the 1 fundamental of CFCl 3 (the freon CFC 11), which is of less academic but much more practical interest. 64,65 The cases of fluorooxiranes and ethyleneepisulfoxides are somewhat different, as here particularly light, simple, and ring-bridged chiral molecules were constructed with the purpose of a successful analysis of the room temperature spectra at high resolution.…”

Torsional splittings in the diode laser slit-jet spectra of the ν6 fundamental of 1-chloro-1,1-difluoroethane (HCFC-142b)

“…The presence of hot-bands and different chlorine isotopic species renders the analysis even more troublesome. We have previously demonstrated [6][7][8][9][10] that the diode laser slit-jet technique, which combines high resolution (0.001 cm À1 typically) with low rotational and vibrational temperatures, can simplify the spectra enormously, allowing for unambiguous assignments and successful analyses.…”