Microwave spectrum, structure and nuclear quadrupole coupling constant tensor of ethyl chloride and vinyl chloride

Abstract

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 r s 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.