MICROWAVE-SPECTRUM, STRUCTURE AND NUCLEAR-QUADRUPOLE COUPLING-CONSTANT TENSOR OF ETHYL CHLORIDE AND VINYL-CHLORIDE

Microwave spectra of ethyl chloride and its eleven isotopic species and vinyl chloride and its nineteen isotopic species have been measured. Least-squares analyses for the observed frequencies give rotational, quartic centrifugal distortion constants and the nuclear quadrupole coupling constants, χ+ and χ-, of all the species of these molecules. The rs structures have been well established from the observed moments of inertia. The principal nuclear quadrupole coupling constants are calculated from the χ+ and χ- values. The principal χ constants of ethyl chloride and vinyl chloride are discussed and compared. © 1990.