Abstract
The pure rotational spectrum of CF3CH2Cl (1-choro-2,2,2-trifluoroethane, HCFC-133a) was investigated at 8–18GHz in supersonic expansion with chirped pulse and cavity rotational spectroscopy, and at 94–309GHz with broadband millimetre wave spectroscopy. Spectroscopic constants for the two principal isotopic species have been considerably updated from global fits over extensive data sets, numbering close to 3000 lines for the ground state of CF3CH235Cl and 1800 lines for CF3CH237Cl. Four different 13C containing isotopologues have been assigned, as well as several new low lying vibrational states. The new measurements have been augmented with anharmonic force field calculations in an evaluation of the semi-experimental equilibrium geometry for CF3CH2Cl.
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