Vibrational spectra of O-ethyl, O-ethyl-1,1-d2 and O-ethyl-2,2,2-d3 phosphorodichloridothioate

Abstract

Infrared and Raman data were obtained for O-ethyl, O-ethyl-1,1-d2, and O-ethyl-2,2,2-d3 phosphorodichloridothioate, and these spectral data were used to assign the vibrational spectra of these molecules. The infrared data obtained at different temperatures show that these molecules exist as rotational isomers, and assignments for the C-O-P(=S)Cl2 group in this series are comparable to those for CH3-O-P(=S)Cl2. The characteristic frequencies assigned to the O-ethyl group are useful in the assignment of more complex O-ethyl phosphorus derivatives. The infrared spectra of O-ethyl phosphorodichloridothioate and O-ethyl phosphorodichloridate are compared, and certain frequency differences are discussed.