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Infrared Analysis of Ethylene Sulfite and sym-Dimethylethylene Sulfite

Volume 24, Number 5 (Oct. 1970) Page 492-495

Dorris, Kenneth L.


The ir spectra of ethylene and sym-dimethylethylene sulfite in the vapor, and dilute solutions in polar and nonpolar solvents have been recorded from 400 to 4000 cm−1. In addition, the far infrared spectra of these compounds have been recorded to 33 cm−1. In the liquid form, an equilibrium between two S=O conformations exists, while in the vapor state, only one conformer is observed. The S=O dipole in these sulfites is more sensitive to solvent than normal ketones and diphenyl sulphoxide and less dependent than dimethyl sulphoxide.