Studies on Photochemical Reaction of Sulfur Dioxid and cis-2-Butene. II

cis-trans isomerization

Abstract

The photochemical reaction of SO₂-cis-2-butene-oxygen-nitrogen system were studied in order to elucidate the mechanism of the photochemical isomerization of cis-2-butene.
The concentration of both SO₂ and cis-2-butene were varied at the range of 50ppm to 1000ppm, and the ratio of [SO₂] to [cis-2-butene] was also varied at the range of 0.05 to 20.
The decay curve of cis-2-butene and the formation curve of trans-2-butene were obtained.
When the ratio of [SO₂] to [cis-2-butene] was greater than 1, main products were SO3 and trans-2-butene, and the reaction mechanism was explained by the Calvert's modal.
However when the above ratio was lower 0.5, a few of both carbonyl compounds and aersol (particles) were produced in addition to SO₃ and trans-2-butene, and the reaction mechanism could not be explained by the Calvert's modal, but by the new model which was added the reaction of carbonyl compounds formation and aersol formation to the Calvert's model.