Millimeter-Wave Spectrum of CF2Cl2, Taking into Account the Hyperfine Structure

A new investigation of the CF235Cl2 ground state rotational spectrum in the 50–100 GHz frequency range gave an opportunity to improve the accuracy of rotational and quartic distortion parameters by an order of magnitude and to determine values of six sextic centrifugal distortion parameters. A special technique was used to process line profiles of unresolved or partially resolved hyperfine structures of rotational transitions. It allowed us to improve significantly values for the diagonal parameters of quadrupole coupling χaa, (χbb–χcc) and to determine the off-diagonal parameter χab.