Theoretical determination of parity-violating vibrational frequency differences between the enantiomers of the CHFClBr molecule

A coupled Hartree-Fock procedure has been employed to estimate the frequency shift in the infrared spectra of the S and R enantiomers of the CHFClBr molecule due to the parity-violating electroweak interaction. The calculations indicate that a resolving power ν/Δν≈1×10¹⁶, i.e., three orders of magnitude larger than that obtained in recent experiments, would be necessary to detect the parity-violating effects. The largest frequency shift was found for C-Cl stretching.